There are 15 words that start with 'flyb'.
| flyby | flyboy | flybys | 
| flybelt | flyblew | flyblow | 
| flyboat | flyboys | flybelts | 
| flyblown | flyblows | flyboats | 
| flybridge | flyblowing | flybridges | 
Note: These 15 words that start with 'flyb' are found from the USA & Canada version of the tournament Scrabble word list.