4 letters
- deaf8
- delf9
- face10
- fade8
- fado8
- fads8
- fall9
- fane8
- fano8
- fans8
- faun9
- feal8
- feds8
- fell9
- fend9
- fens8
- feod8
- feud9
- feus8
- flan9
- flea8
- fled9
- floc11
- floe8
- flue9
- flus9
- foal8
- foes7
- fold9
- fond9
- fons8
- foul9
- fuds9
- fuel9
- full10
- crud9
- crus8
- curd9
- cure8
- curl9
- curn9
- curs8
- dare5
- darn6
- dear5
- doer5
- dore5
- dors5
- dour6
- dura6
- dure6
- durn7
- duro6
- earl5
- earn5
- ears4
- ecru8
- eras4
- erns5
- eros4
- euro5
f -
r -