Daily word games to challenge your mind
Need 7-letter words beginning with OO? This comprehensive list has you covered. Popular examples include OOCYSTS, OOCYTES, OODLINS, plus OOGONIA, OOLITES, OOLITHS and many more. Click any word for its full definition and usage.
| Word | Definition | Length | Syllables |
|---|---|---|---|
| oocysts | 7 | 2 | |
| oocytes | 7 | 3 | |
| oodlins | 7 | 2 | |
| oogonia | 7 | 3 | |
| oolites | 7 | 3 | |
| ooliths | 7 | 2 | |
| oolitic | 7 | 3 | |
| oologic | 7 | 3 | |
| oolongs | 7 | 2 | |
| oomiack | 7 | 2 | |
| oomiacs | 7 | 2 | |
| oomiaks | 7 | 2 | |
| oompahs | 7 | 2 | |
| oophyte | 7 | 2 | |
| ooralis | 7 | 3 | |
| oosperm | 7 | 2 | |
| oospore | 7 | 2 | |
| ootheca | 7 | 3 | |
| ooziest | 7 | 2 |
Are OO-starting words common?
OO is a frequent start; probing vowel swaps after OO quickly narrows options.
Is this list good for crosswords?
Yes—filter by length mentally and scan definitions when available.