4 letters
- sing7
- sinh7
- sink9
- sins5
- sith6
- skim11
- skin9
- skua9
- slam8
- slim8
- slum9
- smit7
- smog9
- smug10
- smut8
- snag7
- snap8
- snaw8
- snib8
- snip8
- snit5
- snob8
- snog7
- snot5
- snow8
- snub9
- snug8
- soak8
- soap7
- soar4
- soda5
- sofa7
- soil5
- soja13
- sola5
- soli5
- solo5
- soma7
- some7
- sone5
- song7
- sons5
- sook8
- soon5
- soot4
- soph9
- sora4
- sori4
- sorn5
- soth6
- souk9
- soul6
- soup8
- sour5
- sous5
- sown8
- soya6
- spam10
- span8
- spin8
- spun9
- stoa4
- stum8
- stun6
- suba8
- such10
- sugh9
- suit5
- sumo8
- sump11
- sums8
- sung8
- sunk10
- sunn7
- suns6
- sura5
- swam10
- swan8
- swim10
- swum11
- tain5
- tams7
- tans5
- taos4
- taus5
- than7
- thin7
- thio6
- this6
- thou7
- thus7
- tins5
- toms7
- tons5
- toom7
- toon5
- tosh6
- tuis5
- tuna6
- tuns6
- tush7
- udos6
- ughs9
- ulan7
- ulna7
- umbo11
- umps11
- unai6
- unau7
- unci9
- unco9
- undo7
- unit6
- unto6
- upas8
- upon9
- urns6
- ursa5
- utas5
- vain9
- vans9
- vaus9
- vims11
- vina9
- vino9
- visa8
- wain8
- wans8
- wash9
- wham12
- whim12
- whin10
- whoa9
- whom12
- wino8
- wins8
- wish9
- wons8
- woos7
- yams9
- yins7
- yoni7
- yuan8
- zins14
- zoom16
- zoon14
- zoos13