4 letters
- buff14
- cuff14
- cure8
- curf11
- duff12
- dure6
- ecru8
- effs10
- euro5
- fare7
- fear7
- fere7
- fern8
- feud9
- feus8
- fief10
- fife10
- fire7
- flue9
- fore7
- four8
- frae7
- free7
- fret7
- froe7
- frug10
- fuel9
- fume11
- furl9
- furs8
- fury10
- fuse8
- fuze17
- grue7
- guff13
- huff13
- kerf11
- luff12
- lure6
- muff14
- mure8
- puff14
- pure8
- raff10
- reef7
- refs7
- reft7
- reif7
- rife7
- riff10
- roue5
- rube8
- rude6
- rued6
- ruer5
- rues5
- ruff11
- rule6
- rune6
- ruse5
- serf7
- suer5
- sure5
- surf8
- teff10
- tref7
- true5
- tuff11
- turf8
- urea5
- urge7
- user5
3 letters
- aff9
- are3
- arf6
- bur7
- cue7
- cur7
- due5
- ear3
- eau4
- ecu7
- eff9
- efs6
- eft6
- elf7
- emf9
- emu7
- era3
- ere3
- erg5
- ern4
- err3
- ers3
- far6
- fed7
- fee6
- feh8
- fem9
- fen7
- fer6
- fet6
- feu7
- few9
- fey8
- fez15
- fie6
- fir6
- flu8
- foe6
- for6
- fou7
- fro6
- fry8
- fub10
- fud8
- fug9
- fun8
- fur7
- her5
- hue6
- iff9
- ire3
- jeu13
- kef10
- kue8
- leu5
- off9
- ore3
- our4
- per6
- pur7
- reb6
- rec6
- red4
- ree3
- ref6
- reg5
- rei3
- rem6
- rep6
- res3
- ret3
- rev7
- rex10
- rif6
- roe3
- rub7
- rue4
- rug6
- rum7
- run5
- rut4
- rye5
- ser3
- sue4
- uke8
- urb7
- urd5
- urn5
- use4