4 letters
- sima7
- simp10
- sims7
- sipe7
- sips7
- skim11
- skip11
- slim8
- slip8
- slop8
- slum9
- smit7
- smog9
- smug10
- smut8
- snip8
- soap7
- soil5
- soli5
- soma7
- some7
- soph9
- sops7
- sori4
- souk9
- soul6
- soup8
- sour5
- sous5
- spam10
- spic10
- spik11
- spin8
- spit7
- spiv11
- spot7
- spud9
- spue8
- spun9
- spur8
- stop7
- stum8
- suit5
- sumo8
- sump11
- sums8
- supe8
- sups8
- swim10
- swop10
- swum11
- tipi7
- tips7
- toms7
- topi7
- tops7
- tuis5
- tump11
- tups8
- udos6
- umbo11
- umps11
- upas8
- updo9
- upon9
- vims11
- wimp13
- wisp10
- wops10
- yips9
- yups10
- zips16