4 letters
- runs6
- ruse5
- rush7
- rusk9
- rust5
- ruts5
- ryas6
- sack11
- sacs7
- saga6
- sail5
- sale5
- sall6
- salp8
- sals5
- salt5
- samp10
- saps7
- sard5
- sari4
- sark8
- saul6
- scab10
- scad8
- scag9
- scam10
- scan8
- scar7
- scat7
- scop10
- scry9
- scud9
- scum11
- scup11
- scut8
- seal5
- sear4
- sera4
- shul8
- sial5
- skua9
- slab8
- slag7
- slam8
- slap8
- slat5
- slaw8
- slay7
- slip8
- slop8
- slub9
- slue6
- slug8
- slum9
- slur6
- slut6
- snap8
- soap7
- soar4
- sola5
- sora4
- soul6
- soup8
- sour5
- spae7
- spam10
- span8
- spar7
- spas7
- spat7
- spay9
- spaz16
- spec10
- spic10
- spry9
- spud9
- spue8
- spun9
- spur8
- star4
- suba8
- such10
- suck12
- suer5
- sulk10
- sulu7
- sump11
- supe8
- sups8
- sura5
- surd6
- sure5
- surf8
- swap10
- tala5
- talc8
- tapa7
- taps7
- tarp7
- tars4
- taus5
- trap7
- tsar4
- tups8
- ulan7
- ulna7
- ulus7
- ulva10
- umps11
- upas8
- urbs8
- urds6
- urea5
- uric8
- urns6
- ursa5
- urus6
- user5
- utas5
- vacs11
- vara8
- vars8
- vasa8
- vaus9
- waps10
- warp10
- wars7
- wasp10
- waul9
- waur8
- wrap10
- yaps9
- yaup10
- yuca10
- yups10
- zaps16