4 letters
- rust5
- ruts5
- scat7
- scop10
- scot7
- scow10
- scud9
- scum11
- scup11
- scut8
- sect7
- sept7
- shoo6
- shop9
- shot6
- shut7
- slop8
- slot5
- slut6
- smut8
- snot5
- soap7
- sock11
- soft7
- solo5
- sook8
- soon5
- soot4
- soph9
- sops7
- sort4
- soth6
- sots4
- souk9
- soul6
- soup8
- sour5
- sous5
- spat7
- spec10
- spic10
- spit7
- spot7
- spud9
- spue8
- spun9
- spur8
- step7
- stoa4
- stob7
- stop7
- stow7
- stub8
- stud6
- stum8
- stun6
- such10
- suck12
- suet5
- suit5
- sumo8
- sump11
- supe8
- sups8
- swop10
- swot7
- taco7
- taos4
- taps7
- taus5
- thou7
- thus7
- tics7
- tips7
- tods5
- toes4
- tofu8
- togs6
- tolu6
- toms7
- tons5
- took8
- tool5
- toom7
- toon5
- toot4
- tope7
- toph9
- topi7
- tops7
- torc7
- toro4
- tors4
- tosh6
- toss4
- tost4
- tots4
- tour5
- tout5
- tows7
- toyo6
- toys6
- trop7
- tubs8
- tuck12
- tugs7
- tuis5
- tump11
- tuns6
- tups8
- tush7
- tusk9
- tuts5
- twos7
- typo9
- udos6
- umps11
- unco9
- unto6
- upas8
- updo9
- upon9
- utas5
- woos7
- wops10
- wost7
- wots7
- yups10
- zoos13