4 letters
- rasp7
- real5
- ream7
- reap7
- recs7
- rems7
- repp10
- reps7
- rues5
- rule6
- rump11
- rums8
- rune6
- runs6
- ruse5
- sacs7
- sale5
- salp8
- sals5
- same7
- samp10
- sane5
- sans5
- saps7
- saul6
- scam10
- scan8
- scar7
- scum11
- scup11
- seal5
- seam7
- sear4
- seas4
- secs7
- sels5
- sera4
- sers4
- slam8
- slap8
- slue6
- slum9
- slur6
- snap8
- spae7
- spam10
- span8
- spar7
- spas7
- spec10
- spue8
- spun9
- spur8
- suer5
- sues5
- sump11
- sums8
- suns6
- supe8
- sups8
- sura5
- sure5
- ulan7
- ulna7
- umps11
- upas8
- urea5
- urns6
- ursa5
- user5
- uses5