4 letters
- rune6
- rung8
- runs6
- runt6
- ruse5
- rush7
- rusk9
- rust5
- ruts5
- ryes6
- sain5
- same7
- samp10
- sane5
- sans5
- saps7
- sari4
- sass4
- scop10
- scum11
- scup11
- seam7
- sear4
- seas4
- secs7
- seem7
- seen5
- seep7
- seer4
- sees4
- sego6
- segs6
- seif7
- seis4
- sels5
- seme7
- semi7
- send6
- sene5
- sent5
- sept7
- sera4
- sere4
- serf7
- sers4
- sets4
- sewn8
- sews7
- shes6
- shim9
- shin7
- ship9
- shmo9
- shoe6
- shop9
- shri6
- shun8
- sibs7
- sice7
- sics7
- side5
- sign7
- sike8
- silo5
- sima7
- simp10
- sims7
- sine5
- sing7
- sinh7
- sink9
- sins5
- sipe7
- sips7
- sire4
- sirs4
- site4
- sits4
- size13
- skep11
- skim11
- skin9
- skip11
- skis8
- slim8
- slip8
- sloe5
- slop8
- slue6
- slum9
- slur6
- smew10
- smit7
- smog9
- smug10
- smut8
- snap8
- sned6
- snib8
- snip8
- snit5
- snob8
- snog7
- snot5
- snow8
- snub9
- snug8
- snye7
- soap7
- soar4
- sobs7
- sods5
- soil5
- soke8
- sole5
- soli5
- sols5
- soma7
- some7
- sone5
- song7
- sons5
- soon5
- soph9
- sops7
- sora4
- sorb7
- sord5
- sore4
- sori4
- sorn5
- sort4
- sots4
- souk9
- soul6
- soup8
- sour5
- sous5
- sown8
- sows7
- soys6
- spae7
- spam10
- span8
- spar7
- spas7
- spec10
- sped8
- spew10
- spic10
- spik11
- spin8
- spit7
- spiv11
- spot7
- spry9
- spud9
- spue8
- spun9
- spur8
- sris4
- stem7
- step7
- stir4
- stop7
- stum8
- stun6
- subs8
- suds6
- sued6
- suer5
- sues5
- suet5
- suit5
- sulu7
- sumo8
- sump11
- sums8
- sung8
- sunk10
- sunn7
- suns6
- supe8
- sups8
- suqs14
- sura5
- surd6
- sure5
- surf8
- suss5
- swim10
- swop10
- swum11
- syne7
- temp10
- tens5
- term7
- tern5
- tier4
- ties4