4 letters
- shim9
- ship9
- shmo9
- shoo6
- shop9
- shri6
- silo5
- sima7
- simp10
- sims7
- sipe7
- sips7
- sire4
- sirs4
- skim11
- skip11
- slim8
- slip8
- slop8
- slum9
- slur6
- smit7
- smog9
- smug10
- smut8
- snip8
- soap7
- soar4
- soil5
- soli5
- solo5
- soma7
- some7
- sook8
- soon5
- soot4
- soph9
- sops7
- sora4
- sorb7
- sord5
- sore4
- sori4
- sorn5
- sort4
- souk9
- soul6
- soup8
- sour5
- sous5
- spam10
- spar7
- spic10
- spik11
- spin8
- spit7
- spiv11
- spot7
- spry9
- spud9
- spue8
- spun9
- spur8
- sris4
- stir4
- stop7
- stum8
- suer5
- suit5
- sumo8
- sump11
- sums8
- supe8
- sups8
- sura5
- surd6
- sure5
- surf8
- swim10
- swop10
- swum11
- tipi7
- tips7
- tiro4
- toms7
- toom7
- topi7
- tops7
- tori4
- toro4
- tors4
- tour5
- trim7
- trio4
- trip7
- trop7
- tuis5
- tump11
- tups8
- udos6
- umbo11
- umps11
- upas8
- updo9
- upon9
- urbs8
- urds6
- uric8
- urns6
- ursa5
- urus6
- user5
- vims11
- wimp13
- wisp10
- woos7
- wops10
- worm10
- yips9
- your7
- yups10
- zips16
- zoom16
- zoos13
- zori13