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 Open, Opportunity. 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 Op

Open Adjective, Verb Opportunity Noun

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. Which of the following is a common collocation with 'open'?

Open weather Open hours Open metal Open gravity

2. In the Middle Ages, what was sometimes made from 'oakberries' (oak galls)?

Wine Ink Bread Rope

3. What part of speech is 'oad'?

Noun Verb Adjective Adverb

4. What is the correct preposition: 'I want to be open ___ you about my past.'

to with for on

5. What are the two primary meanings of the word 'oakboy'?

A lumberjack and a farmer A tree spirit and an acorn-gathering boy A type of tree and a type of bird A knight and a peasant

6. Can you say 'He has two oafdoms'?

Yes, it is plural. No, oafdom is an uncountable noun and has no plural form. Yes, but only in British English. No, because it is a verb.

7. Which sentence uses 'oafs' correctly?

He is oafs. They are a bunch of oafs. Stop oafsing around. She is an oafs.

8. Which word is the best synonym for the *physical* aspect of 'oafish'?

Boorish Graceful Clumsy Tactful

9. Which of the following is a common collocation with 'organize'?

Organize weather Organize your thoughts Organize metal Organize speed

10. What is the plural of 'oakberry'?

Oakberrys Oakberries Oakberry Oakberi

11. Which of the following is an antonym concept to 'Oakenshaw'?

Copse Meadow Thicket Grove

12. Which sentence uses 'Oakesia' correctly?

I am an Oakesia. He oakesia the car. The genus Oakesia is obsolete. The Oakesia barked.

13. Is it correct to say 'The table is made of oaken'?

Yes, always No, you should say 'an oaken table' Only in the UK Only in the past tense

14. Which part of speech does 'oakboy' belong to?

Verb Adjective Noun Adverb

15. How is the word 'open' pronounced in American English?

AH-pen (short a) oh-PEN (stress second syllable) OH-pen (long o, stress first syllable) OO-pen

16. Historically, the root word 'oaf' was believed to be what kind of creature?

A goblin A giant An elf or fairy changeling A dragon

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

Auld Old Odd Ode

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

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

19. Which of the following is a popular, affectionate nickname for Oakland?

Oaktown Oak City Oakville Oakwood

20. Which word rhymes perfectly with 'oak'?

Book Joke Rock Oar

21. 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.

22. What does the archaic word 'oakberry' refer to?

A type of poisonous mushroom An acorn A small blueberry A piece of bark

23. Which of the following is a common misspelling of 'oafishly'?

Oafishly Oaffishly Oafishley Both B and C

24. How is the word 'organize' pronounced in American English?

or-GAN-ize or-gan-IZE OR-guh-nize (stress first syllable) or-JAN-ize

25. How do you correctly pluralize the Oakenshaw family?

The Oakenshaw's The Oakenshaws The Oakenshawes The Oakenshaw

26. How many syllables are in the word 'oafish'?

One Two Three Four

27. In which region was 'oad' primarily used?

The American South Northern England and Scotland Australia Southern France

28. What does it mean to have 'oaken strength'?

To be weak To be flexible To be extremely strong To be light

29. Which of the following is a correct grammatical use of 'oaklet'?

He oakleted the field. The fragile oaklet grew. She is very oaklet. I saw an oaklet tree.

30. What does the phrase 'open mind' mean?

A brain that is visible A willingness to consider new ideas A door that leads to the brain A person who talks too much

31. Which part of speech is the word 'oafdom'?

Adjective Verb Abstract Noun Adverb

32. How should 'Oakesia' be formatted in scientific writing?

All caps In quotes Lowercase and bold Capitalized and italicized

33. What does oakmoss typically smell like?

A damp forest floor Fresh citrus Vanilla and sugar Saltwater and breeze

34. Which sentence is grammatically correct regarding the double-object structure?

She offered to him a drink. She offered a drink him. She offered him a drink. She offered for him a drink.

35. What is the singular form of 'oafs'?

Oaves Oafish Oaf Oafses

36. What is the opposite of an oaklet?

A sapling An acorn A giant ancient oak A pine tree

37. What does it mean to 'open up' to someone?

To physically open a door for them To start a business with them To talk freely about your feelings To argue with them

38. How many syllables does the word 'oakberry' have?

Two Four Three One

39. Which sentence uses 'Oakenshaw' correctly?

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

40. Is it appropriate to use the word 'oafs' in a formal academic essay?

Yes, always Only in titles No, it is too informal Only if quoting a British author

41. 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.

42. What part of speech is the word 'organize'?

Noun Adjective Verb Adverb

43. How is the word 'oafish' pronounced?

AH-fish oh-FISH OH-fish OO-fish

44. Can you say 'He committed an oafishness'?

Yes, it's countable. No, it is an uncountable noun. Yes, in British English. Only when referring to multiple oafs.

45. What is the correct spelling of the word?

oak boy okeboy oakboy oakboi

46. Which sentence uses 'oakling' correctly?

I ate a delicious oakling. The oakling swayed in the breeze. I need to oakling the floor. That is a very oakling idea.

47. How many syllables does the word 'oakboy' have?

One Two Three Four

48. What does 'Oakesia' refer to?

A type of oak tree An obsolete plant genus A botanical garden A language

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

Klutz Genius Scholar Athlete

50. How many syllables does 'Oakesia' have?

Three Four Two Five