There are 13 words that start with 'ovar'.
| ovary | ovarial |
| ovarian | ovaries |
| ovariole | ovaritis |
| ovarioles | ovariotomy |
| ovaritides | ovariectomy |
| ovariotomies | ovariectomies |
| ovariectomized | |
Note: These 13 words that start with 'ovar' are found from the USA & Canada version of the tournament Scrabble word list.