4 letters
- ream7
- reap7
- rear4
- rebs7
- rede5
- reed5
- reef7
- reek8
- reel5
- rees4
- rete4
- rhea6
- robe7
- roue5
- rube8
- rubs8
- ruby10
- rude6
- rued6
- ruer5
- rues5
- ruga7
- rule6
- rune6
- ruse5
- sabe7
- sear4
- seer4
- sera4
- sere4
- suba8
- suer5
- sura5
- sure5
- tabu8
- tare4
- tear4
- tree4
- true5
- tuba8
- tube8
- unbe9
- urbs8
- urea5
- urge7
- ursa5
- user5
- uvea9
- veer8
- vera8
- verb11
- ware7
- waur8
- wear7
- weer7
- were7
- yare6
- year6
- zebu17