There are 10 words that start with 'flabb'.
| flabby | flabbier | 
| flabbily | flabbiest | 
| flabbiness | flabbergast | 
| flabbergasts | flabbinesses | 
| flabbergasted | flabbergasting | 
Note: These 10 words that start with 'flabb' are found from the USA & Canada version of the tournament Scrabble word list.