How this list works
This list finds “o” anywhere in a word – at the start, in the middle or at the end. For a group of letters, the whole group must appear together, in that order. Familiar words carry a small dot and are listed first. Turn Common words only off for the full list, 300 words to a page.
Use the length tabs and the starts with or ends with boxes to narrow it down. If your letters can be in any order, words with letters is the better tool.
Ways to use words containing O
Spelling patterns
Letter groups often make the same sound across many words. Collecting common words that contain O is a quick way to practice a pattern.
Crosswords and puzzles
When you know a chunk of the answer but not where it sits, this list helps. If you also know the length and position, use the crossword helper.
Word searches
Building a word search around a theme or a sound? Pick words from this list, then use the word scramble generator for a matching worksheet.
What you'll find in this list
Of the 77,144 words containing O, 22,913 are common words you'd meet in everyday reading. The rest are rarer: technical terms, old spellings, unusual plurals and words borrowed from other languages. The longest is acclimatization, with 15 letters.
All the words come from a large public-domain word list, with everyday words marked using a separate open database of common English. Offensive words and slurs are left out; if you spot one that slipped through, please use the Report a word link at the bottom of the page.
More ways to search
- Words that start with or words that end in any letters.
- Words with letters you choose, in any order.
- Two letters anywhere in a word, as in words with Q and Z.
- The advanced word search for patterns, excluded letters and parts of speech.
Questions
How many words contain O?
Our dictionary has 77,144 words with O in them. Of those, 22,913 are common everyday words.
Do the letters have to be next to each other?
Yes, when you search for more than one letter: they must appear together, in the order shown. To find words that contain letters in any order, use words with letters.
What is the longest word containing O?
In our list it's acclimatization, with 15 letters. Use the length tabs above the list to browse other long words.
What are some common words with O in them?
A few everyday examples are person, not, youth, group, location. Common words come first in the list and are marked with a small dot.
Can I find words that contain O and start with a certain letter?
Yes. Type the letter into the starts with box above the list, or add an ending in the ends with box. The list updates as you type.
Last updated October 2, 2026