There are 16 words that start with 'flab'.
| flab | flabs |
| flabby | flabbier |
| flabbily | flabella |
| flabbiest | flabellum |
| flabbiness | flabellate |
| flabbergast | flabbergasts |
| flabbinesses | flabelliform |
| flabbergasted | flabbergasting |
Note: These 16 words that start with 'flab' are found from the USA & Canada version of the tournament Scrabble word list.