There are 13 words that start with 'belly'.
| belly | bellyful | bellying | 
| bellyache | bellyband | bellyfuls | 
| bellylike | bellyached | bellyacher | 
| bellyaches | bellybands | bellyachers | 
| bellyaching | ||
Note: These 13 words that start with 'belly' are found from the USA & Canada version of the tournament Scrabble word list.