Table of Contents
Quick Answer
The fastest way to know which spelling to use.
The difference between rumor and rumour comes down entirely to geography.
If you are writing for an audience in the United States, the correct spelling is rumor (with an 'o'). If you are writing for an audience in the United Kingdom, Australia, or New Zealand, the correct spelling is rumour (with a 'u').
Both words refer to the exact same thing: a piece of unverified information or gossip circulating among people. Neither spelling is grammatically incorrect, but using the wrong one for your target region can look out of place.
Rumour vs Rumor at a Glance
A side-by-side breakdown of the key differences.
| Feature | Airplane (US) | Aeroplane (UK) |
|---|---|---|
| Standard Region | United States | United Kingdom |
| Spelling | R-U-M-O-R | R-U-M-O-U-R |
| Syllable Count | 2 (ROO-mer) | 2 (ROO-muh) |
| Origin | Americanized spelling | Latin via French |
| Meaning | Unverified information | Unverified information |
American English: Rumor
How the word is used in the United States.
In the United States, "rumor" is the universally accepted spelling. It uses the "or" suffix, reflecting phonetic simplification. It is used by American news outlets, workplaces, and everyday speakers.
Media Standard
American news organizations and publishers exclusively use the "rumor" spelling (e.g., rumor has it).
Industry Standard
Major American publications and style guides, like the AP Stylebook, follow the "rumor" spelling without exception.
British English: Rumour
How the word is used in the United Kingdom.
In the United Kingdom, "rumour" is the standard spelling. It retains the "u" suffix, a hallmark of British English spelling conventions heavily influenced by Old French. It is used universally in media, literature, and everyday speech.
Media Standard
British news organizations and publishers strictly use the "rumour" spelling (e.g., rumour has it).
Modern Usage
Though casual speech is identical, formal British writing relies on "rumour" rather than the American adaptation.
What Do Both Words Mean?
The definition remains exactly the same.
Despite the spelling difference, both "rumor" and "rumour" mean exactly the same thing. They refer to a story or piece of information that is unverified and spread by word of mouth.
Core Definition
Information or a story that is not verified, often circulating among the public.
Gossip Context
Often used interchangeably with gossip, though a rumor can be about a public event, not just personal matters.
American English Usage
How Americans naturally use the word today.
In the US, "rumor" is used in almost every context, from casual conversation to technical journalism. It applies to celebrity gossip, corporate whispers, and political news.
Casual Conversation
"Did you hear the rumor about the new boss?"
Technical Writing
"The company denied the rumors of a massive layoff."
Political Contexts
"The rumor mill is working overtime during the election."
Everyday Life
"I heard a rumor that they are getting divorced."
British English Usage
How Britons naturally use the word today.
In the UK, "rumour" holds its ground in literature, formal writing, and everyday contexts. It is the expected spelling for all unverified stories and gossip.
Literature and Media
"The rumour about the royal family spread quickly through the press."
Everyday Conversation
"There's a rumour going round that the pub is closing down."
Academic Contexts
"The professor dismissed the rumour about the exam cancellation."
News and Journalism
"The government attempted to quell the rumour of a second lockdown."
Which Spelling Should You Use?
Deciding based on your audience.
The decision is entirely context-driven. If you are writing an email to an American colleague, use "rumor." If you are writing a postcard from London to your friends back in Britain, use "rumour."
Choose "Rumor" if:
You are writing for a US-based publisher, studying at an American school, or creating content primarily for an American audience.
Choose "Rumour" if:
You are submitting to a UK journal, writing for a British audience, or following Commonwealth English standards.
Formal and Professional Writing
What to do in business and academic contexts.
In highly formal writing, the safest approach is to match the regional standard of your publisher. In journalism, using the correct regional spelling builds credibility.
Business Contracts
International corporate reports often use "unverified reports" to prevent ambiguity between American and British stakeholders.
Academic Research
Sociological papers regarding the spread of information use "rumor" in US journals and "rumour" in UK journals.
Pronunciation
The spelling change does not alter the spoken word.
The spelling difference does not change the spoken word at all; both are pronounced with the same number of syllables and stress pattern.
| Word | IPA | Syllables |
|---|---|---|
| Airplane (US) | /ˈruː.mər/ | 2 (ROO-mer) |
| Aeroplane (UK) | /ˈruː.mə/ | 2 (ROO-muh) |
In both American and British English, the word is pronounced with two distinct beats. The American version features a slightly harder 'r' sound at the end due to rhotic pronunciation, while the British version uses a subtler, reduced vowel sound.
Spelling Difference
A visual breakdown of the letters.
The core difference is the presence of the letter "u" right after the "o."
The American version uses just "or," while the British version retains the "our" ending, a hallmark of British English spelling derived from Old French.
Why Are the Spellings Different?
The history behind the transatlantic split.
1. The Latin and French Roots
The word comes from the Latin 'rumorem' (noise, gossip). It entered English via Old French, where the 'u' was often retained in the spelling (rumour).
2. Noah Webster's Reform
In 1828, Noah Webster preferred the simpler 'or' spelling to align with pronunciation and simplify the language. He cemented 'rumor' as the standard American spelling.
3. The British Standard
The UK retained the 'u' in 'rumour' due to the heavy influence of Old French and Norman scribal conventions. This '-our' vs '-or' split became a hallmark of US-UK spelling differences.
Synonyms, Antonyms & Rhyming Words
Words related to, opposite of, and sounding like rumor/rumour.
Synonyms (Similar Meaning)
Antonyms (Opposite Meaning)
Example Sentences
See how both words function in original sentences.
Here are 30 original sentences using the American spelling, "rumor."
- Did you hear the rumor about the new boss?
- The rumor mill was working overtime during the merger.
- The celebrity dismissed the rumor on social media.
- There is a rumor that the store is closing down.
- I don't believe every rumor I hear at work.
- The campaign started a false rumor about the opponent.
- A rumor spread that school would be canceled tomorrow.
- The rumor about the layoff caused panic in the office.
- She tried to start a rumor about her rival.
- The rumor proved to be completely baseless.
- He was the victim of a vicious rumor.
- Rumor has it that they are moving to New York.
- The rumor of his resignation shocked the board.
- You shouldn't spread a rumor without facts.
- The rumor quickly went viral on the internet.
- There's a rumor that tickets are sold out.
- I traced the rumor back to its source.
- The rumor was started by a disgruntled employee.
- She ignored the rumor and focused on her job.
- The rumor about a new product leaked early.
- A wild rumor circulated through the high school.
- The manager quashed the rumor of pay cuts.
- The rumor was blown out of proportion.
- He confirmed the rumor about his engagement.
- The rumor is completely unfounded.
- They laughed off the rumor as a joke.
- The rumor spread like wildfire.
- We need to stop the rumor before it gets out of hand.
- The rumor was reported in the local paper.
- Is there any truth to the rumor about the merger?
Here are 30 original sentences using the British spelling, "rumour."
- Did you hear the rumour about the new boss?
- The rumour mill was working overtime during the merger.
- The celebrity dismissed the rumour on social media.
- There is a rumour that the shop is closing down.
- I don't believe every rumour I hear at work.
- The campaign started a false rumour about the opponent.
- A rumour spread that school would be cancelled tomorrow.
- The rumour about the layoff caused panic in the office.
- She tried to start a rumour about her rival.
- The rumour proved to be completely baseless.
- He was the victim of a vicious rumour.
- Rumour has it that they are moving to London.
- The rumour of his resignation shocked the board.
- You shouldn't spread a rumour without facts.
- The rumour quickly went viral on the internet.
- There's a rumour that tickets are sold out.
- I traced the rumour back to its source.
- The rumour was started by a disgruntled employee.
- She ignored the rumour and focused on her job.
- The rumour about a new product leaked early.
- A wild rumour circulated through the school.
- The manager quashed the rumour of pay cuts.
- The rumour was blown out of proportion.
- He confirmed the rumour about his engagement.
- The rumour is completely unfounded.
- They laughed off the rumour as a joke.
- The rumour spread like wildfire.
- We need to stop the rumour before it gets out of hand.
- The rumour was reported in the local paper.
- Is there any truth to the rumour about the merger?
Rumor in US English
Specific contexts, industry standards, and cultural data for the American spelling.
In the United States, "rumor" is the standard spelling in news, workplace, and everyday writing. American media, publishers, and everyday speakers favor this streamlined spelling.
Media & News Standard
American news organizations and publishers exclusively use the "rumor" spelling. "Rumor has it" is the standard phrase in US media.
Workplace & Corporate
In American corporate environments, "rumor" is used for unverified internal information (e.g., "the rumor mill").
Social & Cultural
The term is standard in American social contexts to describe gossip, hearsay, and urban legends.
Common American Phrases
• Rumor mill: A source of rumors.
• Rumor has it: It is rumored that.
• Start a rumor: To spread gossip.
• Quash a rumor: To deny a rumor.
Rumour in UK English
Specific contexts, industry standards, and cultural data for the British spelling.
In the UK, "rumour" is the standard spelling for all contexts. British style guides and media strictly maintain the traditional French-derived "our" ending.
Media & News Standard
British news organizations and publishers strictly use the "rumour" spelling. "Rumour has it" is the standard phrase in UK media.
Workplace & Corporate
In British corporate environments, "rumour" is used for unverified internal information (e.g., "the rumour mill").
Social & Cultural
British literature and poetry exclusively use "rumour" to describe gossip, hearsay, and idle talk.
Common British Phrases
• Rumour mill: A source of rumours.
• Rumour has it: It is rumoured that.
• Start a rumour: To spread gossip.
• Quash a rumour: To deny a rumour.
Related Noun Spelling Differences
Other words that differ with the our/or rule.
| US English | UK English | Meaning |
|---|---|---|
| Color | Colour | The visual property of an object. |
| Honor | Honour | High respect or privilege. |
| Neighbor | Neighbour | A person living next door. |
| Flavor | Flavour | The taste of food or drink. |
Other US–UK Spelling Differences
More words that change when you cross the pond.
Color vs. Colour
Americans use "color" for the visual property, while Britons use "colour."
Center vs. Centre
The US uses "center" for a midpoint, while the UK uses "centre."
Labor vs. Labour
American English spells it "labor," while British English uses "labour."
Catalog vs. Catalogue
The US prefers "catalog," while the UK often uses "catalogue."
Common Mistakes
Frequent errors writers make with these spellings.
Mixing spellings within the same document.
✓ Pick one regional standard and stick to it.
Why: Writing "The rumor was a nasty rumour" confuses the reader and breaks the consistency of your text.
Using "rumour" in an American academic paper.
✓ Use "rumor" for US-based journals and schools.
Why: American professors and publishers expect standard American English. Using the British spelling looks like a typo in this context.
Using "rumor" in a British newspaper.
✓ Use "rumour" for UK audiences.
Why: British news organizations and publishers strictly enforce traditional spelling standards in their publications.
Mispronouncing "rumour" with an "oor" sound (like in "moor").
✓ Pronounce it "ROO-muh."
Why: The 'our' in British English does not sound like 'oor.' It is a reduced vowel sound, creating a subtle ending to the word.
Assuming "rumor" and "rumour" have different meanings.
✓ Recognize that they are entirely the same word.
Why: Whether referring to gossip, corporate whispers, or political news, the meaning is identical; only the regional spelling differs.
Hyphenating the words ("rum-our").
✓ Always use a single, unhyphenated word.
Why: While early texts sometimes had different conventions, modern English treats both forms as solid compound words.
Forgetting that Canada leans British for this word.
✓ Use "rumour" for Canadian audiences, though "rumor" is understood.
Why: Despite proximity to the US, Canadian English heavily favors British spellings for '-our' vs '-or' words.
Assuming the 'u' changes the meaning.
✓ Recognize it as a purely orthographic difference.
Why: Some writers assume 'rumour' means verified gossip while 'rumor' means unverified, but both are unverified in their respective regions.
Confusing the noun with "roomer" (a tenant).
✓ Keep "rumor/rumour" (gossip) separate from "roomer" (lodger).
Why: "Roomer" is a person who rents a room. "Rumor" is a piece of gossip. They are homophones but have entirely different meanings.
Assuming the 'or' is sharp in American English.
✓ Pronounce the American 'or' exactly like the British 'our'.
Why: The 'or' and 'our' produce the exact same soft consonant sound in this context. Neither is sharper or harsher than the other.
Writing for an International Audience
How to handle the split when writing globally.
If you are writing a blog, book, or manual for a global audience, you must pick a primary English standard. Most international organizations choose either US or UK English as their default and stick to it.
Pro Tip: Because American media dominates globally, many ESL learners are more familiar with "rumor." However, if your organization is based in Europe or the Commonwealth, "rumour" is the expected standard.
Memory Tip
An easy way to remember which spelling belongs to which country.
If you struggle to remember the difference, use this simple association trick:
Notice the "u." The UK spelling keeps the "u" in "rumour." America drops the "u" for "rumor."
🎮 Mini Quiz
Test your knowledge with these interactive questions.
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Frequently Asked Questions
Quick answers to common questions.
Are 'rumor' and 'rumour' pronounced the same way?
Essentially, yes. Both are pronounced with two syllables (ROO-mer / ROO-muh). The American version has a slightly harder 'r' sound, while the British version uses a reduced vowel, but the pronunciation is largely identical.
Why does America use 'rumor' instead of 'rumour'?
In the early 19th century, American lexicographer Noah Webster sought to simplify American spelling to make it distinct from British English and more phonetic. Dropping the 'u' in 'rumour' was part of this movement.
Is 'rumour' ever used in the United States?
It is very rare in modern American English. You might occasionally see it in historical texts or British literary works published in the US, but 'rumor' is the undisputed standard in America today.
What about Canada and Australia? Which spelling do they use?
Canada generally follows the British spelling ('rumour'), though American spelling is also widely understood. Australia and New Zealand follow British English and use 'rumour'.
Is 'rumor' ever a person who rents a room (roomer)?
No. A person who rents a room is spelled 'roomer'. 'Rumor'/'Rumour' is exclusively used for unverified information and gossip, though they are homophones.
Which spelling is older, 'rumor' or 'rumour'?
'Rumour' is the older spelling, retaining the 'u' from Old French. 'Rumor' came later as an Americanized simplification introduced by Noah Webster.
Should I use 'rumor' or 'rumour' in academic writing?
You should match the spelling to the regional standard of your audience or publisher. If you are writing for an American journal, use 'rumor'. For a British or international European journal, 'rumour' is preferred.
What is the word 'rumour' derived from?
The word comes from the Latin word 'rumorem', meaning noise or gossip. It entered English through Old French, which influenced the retention of the 'u' in British spelling.
Are there other words that follow this 'or' vs 'our' pattern?
Yes, this is a very common pattern. Other examples include 'color/colour', 'honor/honour', 'flavor/flavour', and 'neighbor/neighbour'.
Which word is more commonly used globally today?
Because of the dominance of the American tech and media industries, 'rumor' is recognized globally. However, 'rumour' remains the correct standard spelling in formal British, Australian, and New Zealand English.
Quick Comparison
The final verdict on rumour vs rumor.
| Factor | Airplane | Aeroplane |
|---|---|---|
| Region | USA | UK |
| Syllables | 2 | 2 |
| Safest Alternative | Gossip / Hearsay |
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