4 letters
- rasp7
- rath6
- rats4
- raws7
- rays6
- refs7
- reif7
- reis4
- resh6
- rhea6
- rhos6
- rhus7
- rial5
- rias4
- ribs7
- rich9
- rids5
- rife7
- riff10
- rifs7
- rift7
- rigs6
- rims7
- rins5
- rips7
- rise4
- risk8
- ruff11
- rush7
- ryas6
- sadi5
- safe7
- said5
- sail5
- sain5
- saki8
- sard5
- sari4
- sark8
- sash6
- sati4
- scar7
- sear4
- seif7
- sera4
- serf7
- shad7
- shag8
- shah8
- sham9
- shat6
- shaw9
- shay8
- shea6
- shim9
- shin7
- ship9
- shit6
- shiv10
- shri6
- sial5
- sift7
- sigh8
- sima7
- sinh7
- sire4
- sirs4
- sith6
- soar4
- sofa7
- sora4
- sori4
- spar7
- sris4
- star4
- stir4
- sura5
- surf8
- tahr6
- tars4
- thir6
- this6
- tiff10
- tsar4
- ursa5
- vair8
- vars8
- visa8
- waff13
- waif10
- wair7
- wars7
- wash9
- whir9
- wish9
- yaff12
- zarf16