4 letters
- roue5
- rues5
- ruin6
- rule6
- rums8
- rune6
- runs6
- ruse5
- rush7
- sail5
- sain5
- sale5
- same7
- sane5
- sari4
- saul6
- scam10
- scan8
- scar7
- scum11
- seal5
- seam7
- sear4
- seel5
- seem7
- seen5
- seer4
- seme7
- semi7
- sene5
- sera4
- sere4
- sham9
- shea6
- shim9
- shin7
- shmo9
- shoe6
- shri6
- shul8
- shun8
- sial5
- sice7
- silo5
- sima7
- sine5
- sinh7
- sire4
- slam8
- slim8
- sloe5
- slue6
- slum9
- slur6
- soar4
- soil5
- sola5
- sole5
- soli5
- soma7
- some7
- sone5
- sora4
- sore4
- sori4
- sorn5
- soul6
- sour5
- such10
- suer5
- sumo8
- sura5
- sure5
- ulan7
- ulna7
- unai6
- unci9
- unco9
- urea5
- uric8
- urns6
- ursa5
- user5