4 letters
- runs6
- rusk9
- sabs7
- sack11
- sacs7
- sals5
- sank9
- sans5
- saul6
- scab10
- scan8
- scop10
- scot7
- scow10
- scud9
- scum11
- scup11
- scut8
- secs7
- sels5
- shul8
- shun8
- sibs7
- sick11
- sics7
- silk9
- silo5
- sink9
- sins5
- skas8
- skin9
- skis8
- skua9
- slab8
- slob8
- sloe5
- slog7
- slop8
- slot5
- slow8
- slub9
- slue6
- slug8
- slum9
- slur6
- slut6
- snib8
- snob8
- snog7
- snot5
- snow8
- snub9
- snug8
- soak8
- sobs7
- sock11
- sods5
- soil5
- soke8
- sola5
- sold6
- sole5
- soli5
- solo5
- sols5
- sone5
- song7
- sons5
- sook8
- soon5
- sops7
- sorb7
- sorn5
- sots4
- souk9
- soul6
- soup8
- sour5
- sous5
- sown8
- sows7
- soys6
- spun9
- stob7
- stub8
- stun6
- suba8
- subs8
- such10
- suck12
- suds6
- sues5
- sulk10
- sulu7
- sumo8
- sums8
- sung8
- sunk10
- sunn7
- suns6
- sups8
- suqs14
- suss5
- swob10
- sybo9
- sync10
- tolu6
- tons5
- toss4
- tsks8
- tubs8
- tuck12
- tuns6
- tusk9
- udos6
- ukes9
- ulan7
- ulna7
- ulus7
- umbo11
- unbe9
- unci9
- unco9
- undo7
- unto6
- upon9
- urbs8
- urns6
- uses5
- woks11
- wonk12
- wons8
- wuss8
- yobs9
- yock13
- yoks10
- yolk11
- yuck14
- yuks11
- zonk18