There are 15 words that start with 'ool'.
| oolite | oolith | oology |
| oolong | oolites | ooliths |
| oolitic | oologic | oolongs |
| oolachan | oologies | oologist |
| oolachans | oological | oologists |
Note: These 15 words that start with 'ool' are found from the USA & Canada version of the tournament Scrabble word list.