4 letters
- arks8
- auks9
- burs8
- busk12
- crus8
- curs8
- cusk12
- dusk10
- furs8
- husk11
- irks8
- kirs8
- knur10
- kors8
- kris8
- kues9
- kuru10
- lurk10
- murk12
- musk12
- ours5
- purs8
- rhus7
- risk8
- rubs8
- ruck12
- rues5
- rugs7
- rums8
- runs6
- ruse5
- rush7
- rusk9
- rust5
- ruts5
- sark8
- skua9
- slur6
- souk9
- sour5
- spur8
- suck12
- suer5
- sulk10
- sunk10
- sura5
- surd6
- sure5
- surf8
- turk9
- tusk9
- ukes9
- urbs8
- urds6
- urns6
- ursa5
- urus6
- user5
- yuks11
3 letters