4 letters
- rasp7
- rats4
- raws7
- rays6
- refs7
- reif7
- reis4
- rial5
- rias4
- ribs7
- rick11
- rids5
- rife7
- riff10
- rifs7
- rift7
- rigs6
- rims7
- rink9
- rins5
- rips7
- rise4
- risk8
- rusk9
- ryas6
- sack11
- sadi5
- safe7
- said5
- sail5
- sain5
- sake8
- saki8
- sank9
- sard5
- sari4
- sark8
- sati4
- scar7
- sear4
- seif7
- sera4
- serf7
- shri6
- sial5
- sick11
- sift7
- sike8
- silk9
- sima7
- sink9
- sire4
- sirs4
- skag10
- skas8
- skat8
- skid9
- skim11
- skin9
- skip11
- skis8
- skit8
- skua9
- soak8
- soar4
- sofa7
- sora4
- sori4
- spar7
- spik11
- sris4
- star4
- stir4
- sura5
- surf8
- tars4
- task8
- tsar4
- ursa5
- vair8
- vars8
- visa8
- waif10
- wair7
- wark11
- wars7
- yaks10
- zarf16