4 letters
- rest4
- rete4
- rets4
- revs8
- rhea6
- rhos6
- rhus7
- rice7
- rich9
- riel5
- rife7
- rifs7
- rile5
- rins5
- rise4
- rocs7
- roes4
- role5
- rolf8
- rose4
- rues5
- rule6
- rune6
- runs6
- ruse5
- rush7
- ryes6
- safe7
- sale5
- sane5
- scan8
- scar7
- scry9
- seal5
- sear4
- secs7
- sect7
- seed5
- seek8
- seel5
- seem7
- seen5
- seep7
- seer4
- sees4
- seif7
- self8
- sell6
- sels5
- seme7
- send6
- sene5
- sent5
- sera4
- sere4
- serf7
- sers4
- sewn8
- shea6
- shed7
- shes6
- shew9
- shin7
- shoe6
- shri6
- shul8
- shun8
- sice7
- sine5
- sinh7
- sire4
- skee8
- sled6
- slew8
- sloe5
- slue6
- slur6
- sned6
- snye7
- sole5
- sone5
- sore4
- sorn5
- spec10
- such10
- suer5
- sure5
- surf8
- syce9
- sync10
- syne7
- teel5
- teen5
- tees4
- tele5
- tels5
- tens5
- tern5
- thee6
- then7
- tree4
- tref7
- urns6
- user5
- veer8
- vees8
- weel8
- ween8
- weer7
- wees7
- wens8
- were7
- whee9
- when10
- wren8
- yech11
- yens7
- zees13