4 letters
- rune6
- runs6
- ruse5
- sale5
- sane5
- saul6
- scan8
- scud9
- scum11
- scup11
- scut8
- seal5
- secs7
- sect7
- seel5
- seen5
- self8
- sell6
- sels5
- send6
- sene5
- sent5
- sewn8
- shul8
- shun8
- sice7
- sine5
- sled6
- slew8
- sloe5
- slub9
- slue6
- slug8
- slum9
- slur6
- slut6
- sned6
- snub9
- snug8
- snye7
- sole5
- sone5
- soul6
- spec10
- spue8
- spun9
- stun6
- such10
- suck12
- sued6
- suer5
- sues5
- suet5
- sulk10
- sulu7
- sung8
- sunk10
- sunn7
- suns6
- supe8
- sure5
- syce9
- sync10
- syne7
- tels5
- tens5
- tule6
- tune6
- tuns6
- ukes9
- ulan7
- ulna7
- ulus7
- unbe9
- unci9
- unco9
- unde7
- urns6
- used6
- user5
- uses5
- wens8
- yens7
- yule8