4 letters
- scam10
- scan8
- scar7
- scat7
- scop10
- scot7
- scow10
- scud9
- scum11
- scup11
- scut8
- seal5
- shop9
- shul8
- sial5
- silo5
- skua9
- slab8
- slag7
- slam8
- slap8
- slat5
- slaw8
- slay7
- slip8
- slob8
- sloe5
- slog7
- slop8
- slot5
- slow8
- slub9
- slue6
- slug8
- slum9
- slur6
- slut6
- snap8
- soak8
- soap7
- soar4
- sock11
- soda5
- sofa7
- soil5
- soja13
- sola5
- sold6
- sole5
- soli5
- solo5
- sols5
- soma7
- soph9
- sops7
- sora4
- souk9
- soul6
- soup8
- sour5
- sous5
- soya6
- spae7
- spam10
- span8
- spar7
- spas7
- spat7
- spay9
- spaz16
- spec10
- spic10
- spot7
- spud9
- spue8
- spun9
- spur8
- stoa4
- stop7
- suba8
- such10
- suck12
- sulk10
- sulu7
- sumo8
- sump11
- supe8
- sups8
- sura5
- swap10
- swop10
- taco7
- talc8
- taos4
- taps7
- taus5
- tola5
- tolu6
- tops7
- tups8
- udos6
- ulan7
- ulna7
- ulus7
- ulva10
- umps11
- unco9
- upas8
- updo9
- upon9
- ursa5
- utas5
- vacs11
- vaus9
- waps10
- wasp10
- waul9
- wops10
- yaps9
- yaup10
- yuca10
- yups10
- zaps16