There are 12 words that start with 'clow'.
| clown | clowns |
| clowder | clowned |
| clowders | clownery |
| clowning | clownish |
| clowneries | clownishly |
| clownishness | clownishnesses |
Note: These 12 words that start with 'clow' are found from the USA & Canada version of the tournament Scrabble word list.