Is 'O' a vowel or a consonant?

The letter O is a vowel in the English alphabet. It is one of the five standard vowels used to form syllables.

What are some common words that start with O?

Some common words starting with O include various common terms. These words are frequently used in everyday English communication.

What is the longest word starting with O?

There are many long words starting with O, often found in scientific or medical terminology. Exploring our O-words by length list above can help you find high-value words for word games.

Are there any two-letter words starting with O for Scrabble?

Yes, there are usually valid two-letter words starting with O that are accepted in Scrabble. These short words are incredibly useful for clearing your rack and scoring parallel points.

How is the letter O pronounced in American English?

In American English, the letter O is pronounced with its distinct alphabetical sound. However, its pronunciation can change slightly depending on its position in a word and the letters surrounding it.

Words Starting
With O

Explore the vast world of "O" words. Filter by two-letter combinations below to find exactly what you need. Perfect for students, teachers, and word game enthusiasts.

Explore Words

Total Words

All oa ob oc od oe of og oh oi oj ok ol om on oo op oq or os ot ou ov ow ox oy oz

Words Starting With Ow

No Words Found

We couldn't find any words starting with "O" for the combination "Ow" in our dictionary. Try selecting another combination!

Origin of the Letter O

Why is 'O' shaped and used the way it is?

The letter 'O' traces its roots back to the Phoenician alphabet around 1000 BCE. The Phoenicians called it "Ayin". Originally a drawing of a human eye. The Greeks simplified the circle into Omicron (O) which passed directly to Latin.

The Evolution

Phoenician: Ayin (Meaning: Eye)

Original Symbol: 𐤏

Greek & Latin: Adapted into the modern shape.

Modern English: O

Usage & Significance

Understanding the origin of 'O' helps with spelling, pronunciation, and recognizing root words in modern English vocabulary.

O Words by Length

Quick reference for O-words sorted by character count.

Length	Common Words	Scrabble Point Value Avg
3 Letters	OAD, OAF, OAK	3 - 6 pts
4 Letters	OAFS, OPEN	4 - 8 pts
5 Letters	OADAL, OAKEN, OFFER	5 - 10 pts
6 Letters	OAFDOM, OAFISH, OAKBOY, OAKLET	6 - 12 pts
7 Letters	OAKESIA, OAKLAND, OAKLIKE, OAKLING	7 - 14 pts
8 Letters	OAFISHLY, OAKBERRY, ORGANIZE	8 - 16 pts

Explore Other Words

Navigate through the alphabet to find more words.

Words Starting With

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Words Ending With

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Frequently Asked Questions

Common questions about words starting with O.

Test Your Knowledge

Take this 50-question quiz on words starting with O.

1. What is the adjective form of 'organize' meaning 'neat and methodical'?

Organizing Organization Organized Organizer

2. Why did writers historically use the spelling 'oad'?

It was a typo. To reflect regional accents that dropped the 'l'. To make words longer. It was a royal decree.

3. Historically, the word 'oaf' was a variation of which word?

Ox Elf Wolf Bear

4. What part of speech is the word 'oadal'?

Noun Verb Adjective Adverb

5. Where does the stress fall in the pronunciation of 'oaken'?

First syllable Second syllable Evenly on both No stress

6. How many syllables does 'oafishly' have?

Two Three Four One

7. What is the plural of 'oakberry'?

Oakberrys Oakberries Oakberry Oakberi

8. Which suffix in 'oaklet' indicates smallness?

-oak -et -let -oakl

9. Which word is an antonym for 'organize'?

Arrange Sort Disorganize Systematize

10. What does the word 'oaf' mean?

A type of bread A mythological elf A clumsy, awkward person A large boat

11. How is the word 'oafs' pronounced?

OH-fs o-AH-fs OOFS OFF-iss

12. What does the plural noun 'oafs' refer to?

Large farm animals Clumsy, awkward, or stupid men Magical forest creatures Expensive leather shoes

13. What is the correct spelling of the word?

oak boy okeboy oakboy oakboi

14. Which of the following is the correct part of speech for 'oafish'?

Noun Verb Adjective Adverb

15. Is oakmoss safe to eat?

Yes, it is a delicacy Yes, but only when boiled No, it is not edible No, it is highly toxic immediately

16. Which word is an antonym for 'observe' when used to mean following a rule?

Comply Follow Violate Respect

17. Which sentence uses 'oafishness' correctly?

He oafishnessed the door. That was an oafishness joke. We laughed at his sheer oafishness. He is very oafishness.

18. What is the opposite of an oaklet?

A sapling An acorn A giant ancient oak A pine tree

19. In which syllable is the primary stress in 'Oakesia'?

First Second Third Fourth

20. Which of these is an antonym (opposite concept) for oak in terms of wood type?

Hardwood Maple Pine (Softwood) Timber

21. What is the difference between 'observe' and 'notice'?

They mean exactly the same thing. Observe is casual; notice is deliberate. Observe implies deliberate, prolonged study; notice is sudden and casual. Observe is only for hearing; notice is for seeing.

22. Which sentence uses 'observe' correctly to mean 'watching'?

I observed him to sleep. I observed him sleep. I observed him to sleeping. I observed on him sleeping.

23. What is the noun form of 'offer' meaning 'a thing presented for acceptance'?

Offering Offerer Offer Offered

24. Which of the following is a major economic feature of Oakland?

The Hollywood film studios The Port of Oakland The Las Vegas strip The Silicon Valley tech campus

25. Which family does Oakesia belong to?

Rosaceae Pinaceae Phrymaceae Poaceae

26. What is an 'oakling'?

An acorn A mature oak tree A young oak tree A type of oak leaf disease

27. Which of the following is a grammatical rule for 'Oakenshaw'?

It must be lowercase. It takes the article 'the'. It is always capitalized. It can be used as a verb.

28. Why is 'Oakesia' no longer used in modern botany?

The plants are extinct It was a hoax It is now classified under Erythranthe It was renamed after a bird

29. How do you correctly pluralize the Oakenshaw family?

The Oakenshaw's The Oakenshaws The Oakenshawes The Oakenshaw

30. What does the dialectal word 'oad' mean?

Old Odd A road A heavy load

31. What is the opposite of 'oaklike' in terms of material strength?

Sturdy Hard Flimsy Durable

32. What is the standard modern English spelling of 'oad'?

Auld Old Odd Ode

33. Which sentence is grammatically correct regarding the verb 'open'?

Open me the door. Open the door to me. Open the door for me. Open me to the door.

34. Which sentence is grammatically correct?

I have many opportunity. He missed an opportunity to buying a house. This is a great opportunity for me. She has an opportunity of studying.

35. Which word is a close modern synonym for 'oaf'?

Klutz Genius Scholar Athlete

36. Which of the following is the exact opposite of 'oadal' land?

Freehold land Allodial land Feudal land Ancestral land

37. Which word is an antonym for 'opportunity'?

Chance Prospect Setback Opening

38. In what context is it inappropriate to use the word 'oakling'?

In a poem about nature In a scientific forestry report In a fantasy novel In a children's book about trees

39. How is 'oaklike' typically spelled in modern English?

As two separate words With a hyphen (oak-like) As one word (oaklike) With an apostrophe

40. What language did the roots of 'Oakenshaw' originate from?

Latin French Old English Greek

41. Which of the following is the best antonym for 'oaf'?

Klutz Lout Dancer Fool

42. Which suffix is added to 'oak' to make 'oaken'?

-ly -ing -en -ness

43. Which sentence uses 'Oakenshaw' correctly?

I walked through an oakenshaw. The oakenshaw is tall. We visited the Oakenshaw estate. He is very oakenshaw.

44. Which word sounds exactly like 'Oakland' but refers to a city in New Zealand?

Oakhaven Auckland Oklahoma Ostend

45. Which word is the best synonym for 'oaklet'?

Sapling Lumber Root Canopy

46. What is the difference between 'oafish' and 'boorish'?

Oafish means rude; boorish means clumsy. Oafish implies clumsiness and stupidity; boorish implies rudeness. They mean exactly the same thing. Oafish is a compliment; boorish is an insult.

47. Which mythological creature is the word 'oaf' etymologically related to?

Dragons Trolls Elves Giants

48. Where does oakmoss primarily grow?

On rocks in the desert On the bark of oak trees In shallow ponds On the forest floor

49. What is the noun form of 'organize' meaning 'a person who arranges events'?

Organization Organizer Organized Organizing

50. Because 'Oakland' is a proper noun, how should it be written?

In italics All lowercase Capitalized In quotes