4 letters
- rhos6
- rhus7
- rias4
- ribs7
- rich9
- rids5
- rifs7
- rigs6
- rims7
- rins5
- riot4
- rips7
- rise4
- risk8
- robe7
- robs7
- rocs7
- rods5
- roes4
- roil5
- roms7
- rood5
- roof7
- rook8
- room7
- root4
- rose4
- rosy6
- roti4
- roto4
- rots4
- rows7
- rubs8
- rush7
- sari4
- shim9
- shin7
- ship9
- shit6
- shiv10
- shmo9
- shod7
- shoe6
- shog8
- shoo6
- shop9
- shot6
- show9
- shri6
- sibb10
- sibs7
- sigh8
- silo5
- sinh7
- sire4
- sirs4
- sith6
- slob8
- snib8
- snob8
- soar4
- sobs7
- soil5
- soli5
- solo5
- sook8
- soon5
- soot4
- soph9
- sora4
- sorb7
- sord5
- sore4
- sori4
- sorn5
- sort4
- soth6
- sour5
- sris4
- stir4
- stob7
- swob10
- sybo9
- thio6
- thir6
- this6
- thro6
- tiro4
- tori4
- toro4
- tors4
- tosh6
- trio4
- urbs8
- whir9
- wish9
- woos7
- yobs9
- zoos13
- zori13