Explore our complete, outstanding collection of words starting with O. The letter O is a versatile vowel with multiple pronunciations. Whether you are playing Scrabble, Words With Friends, Wordle, or solving crossword puzzles, this word list will help you find exactly the right word.
O-Words by Length
Browse all valid Scrabble and Words With Friends words starting with O, organised by word length.
3-Letter Words Starting with O (45 words)
All 45 3-letter words starting with O
4-Letter Words Starting with O (107 words)
Showing 100 of 107 total 4-letter words starting with O
5-Letter Words Starting with O (181 words)
Showing 100 of 181 total 5-letter words starting with O
6-Letter Words Starting with O (325 words)
Showing 100 of 325 total 6-letter words starting with O
7-Letter Words Starting with O (618 words)
Showing 100 of 618 total 7-letter words starting with O
8-Letter Words Starting with O (972 words)
Showing 100 of 972 total 8-letter words starting with O
Did you know? O is one of the oldest letters, virtually unchanged from its Phoenician circular form 3,000 years ago.
Find every valid word starting with O. Our list includes thousands of O-words for Scrabble, Words with Friends, Wordle & more. Browse by length, point value, or definition.
Words starting with O are essential for word game players. Our database includes every valid O-word in official Scrabble dictionaries. Use the tool below to find words.
Browse O-words by length: 3-letter, 4-letter, 5-letter, 6-letter, 7-letter words.
Frequently Asked Questions
How many words starting with O are there?
The exact count depends on which dictionary you use. Our list is based on the Tournament Word List (TWL) and SOWPODS dictionaries used in competitive Scrabble. Browse the sections above organized by word length to find the words you need.
What are the best Scrabble words starting with O?
The highest-scoring words starting with O tend to be longer words that use high-value tiles like J, Q, X, and Z. Check the 7-letter word section above for potential Scrabble bingos worth 50 bonus points.
Can I use these words in Words With Friends?
Most words on this list are valid in both Scrabble and Words With Friends, though each game has a slightly different official dictionary. Use our Words With Friends Cheat tool to verify specific words.
What about words ending with O?
Looking for words that end with O instead? Check out our words ending with O page for a complete list.