4 letters
- owns8
- poco10
- pons8
- poon8
- pubs11
- puns9
- robs7
- rocs7
- rubs8
- runs6
- scab10
- scan8
- scop10
- scot7
- scow10
- scud9
- scum11
- scup11
- scut8
- shoo6
- shun8
- slob8
- slub9
- snib8
- snob8
- snog7
- snot5
- snow8
- snub9
- snug8
- sobs7
- sock11
- solo5
- sone5
- song7
- sons5
- sook8
- soon5
- soot4
- sorb7
- sorn5
- souk9
- soul6
- soup8
- sour5
- sous5
- sown8
- spun9
- stob7
- stub8
- stun6
- suba8
- subs8
- such10
- suck12
- sulu7
- sumo8
- sung8
- sunk10
- sunn7
- suns6
- swob10
- sybo9
- sync10
- tons5
- toon5
- tubs8
- tuns6
- udos6
- ulus7
- umbo11
- unau7
- unbe9
- unci9
- unco9
- undo7
- unto6
- upon9
- urbs8
- urns6
- urus6
- wons8
- woos7
- yobs9
- zoon14
- zoos13