There are 10 words that start with 'flys'.
| flysch | flysches | flysheet | 
| flyspeck | flysheets | flyspecks | 
| flyspecked | flyswatter | flyspecking | 
| flyswatters | ||
Note: These 10 words that start with 'flys' are found from the USA & Canada version of the tournament Scrabble word list.