There are 12 words that start with 'crot'.
| crotch | croton | 
| crotons | crotched | 
| crotches | crotchet | 
| crotchets | crotchety | 
| crotonbug | crotonbugs | 
| crotchetiness | crotchetinesses | 
Note: These 12 words that start with 'crot' are found from the USA & Canada version of the tournament Scrabble word list.