There are 21 words that start with 'fret'.
| fret | frets | 
| fretty | fretful | 
| fretsaw | fretted | 
| fretter | fretless | 
| fretsaws | fretsome | 
| fretters | frettier | 
| fretting | fretwork | 
| fretboard | fretfully | 
| frettiest | fretworks | 
| fretboards | fretfulness | 
| fretfulnesses | |
Note: These 21 words that start with 'fret' are found from the USA & Canada version of the tournament Scrabble word list.