4 letters
- arfs7
- burs8
- crus8
- curf11
- curs8
- feus8
- firs7
- flus9
- four8
- frug10
- fubs11
- fuds9
- fugs10
- funs9
- furl9
- furs8
- fury10
- fuse8
- fuss8
- ours5
- purs8
- refs7
- rhus7
- rifs7
- rubs8
- rues5
- ruff11
- rugs7
- rums8
- runs6
- ruse5
- rush7
- rusk9
- rust5
- ruts5
- serf7
- slur6
- sour5
- spur8
- suer5
- sura5
- surd6
- sure5
- surf8
- turf8
- urbs8
- urds6
- urns6
- ursa5
- urus6
- user5
3 letters