4 letters
- plea8
- pleb11
- prau8
- pula9
- pule9
- pull10
- pure8
- purl9
- purr8
- race7
- raff10
- raft7
- rage6
- rail5
- rake8
- rale5
- rape7
- rare4
- rase4
- rate4
- rave8
- raze13
- read5
- real5
- ream7
- reap7
- rear4
- rebs7
- reef7
- reel5
- refs7
- reft7
- reif7
- rely7
- rhea6
- rial5
- riel5
- rife7
- rile5
- rill6
- roar4
- robe7
- role5
- rolf8
- roll6
- roue5
- rube8
- rubs8
- ruby10
- rude6
- rued6
- ruer5
- rues5
- ruff11
- ruga7
- rule6
- ruly8
- rune6
- ruse5
- sabe7
- safe7
- sale5
- sall6
- saul6
- seal5
- sear4
- self8
- sell6
- sera4
- serf7
- slab8
- slub9
- slue6
- slur6
- suba8
- suer5
- sura5
- sure5
- surf8
- tabu8
- tael5
- tale5
- tall6
- tare4
- teal5
- tear4
- tela5
- tell6
- tref7
- true5
- tuba8
- tube8
- tufa8
- tule6
- turf8
- ulan7
- ulna7
- ulva10
- unbe9
- urbs8
- urea5
- urge7
- ursa5
- user5
- uvea9
- vale9
- veal9
- vela9
- vera8
- verb11
- wale8
- wall9
- ware7
- waul9
- waur8
- weal8
- wear7
- well9
- yare6
- year6
- yell8
- yule8
- zarf16
- zeal14
- zebu17