4 letters
- puke12
- pule9
- pure8
- purl9
- raff10
- rake8
- rale5
- real5
- reck11
- rede5
- reed5
- reef7
- reek8
- reel5
- rees4
- refs7
- reft7
- reif7
- rely7
- rete4
- riel5
- rife7
- riff10
- rile5
- role5
- rolf8
- roue5
- rube8
- ruck12
- rude6
- rued6
- ruer5
- rues5
- ruff11
- rule6
- ruly8
- rune6
- ruse5
- rusk9
- ryke10
- seek8
- seel5
- seer4
- self8
- sere4
- serf7
- skee8
- slue6
- slur6
- suer5
- sulk10
- sure5
- surf8
- teel5
- teff10
- tele5
- tree4
- tref7
- trek8
- true5
- tuff11
- tule6
- turf8
- turk9
- ukes9
- urea5
- urge7
- user5
- veer8
- week11
- weel8
- weer7
- were7
- yelk11
- yerk10
- yeuk11
- yule8
- zerk17