4 letters
- rhea6
- rice7
- ripe7
- roar4
- robe7
- rope7
- roue5
- roup8
- rube8
- rubs8
- ruby10
- ruck12
- rude6
- rued6
- ruer5
- rues5
- ruga7
- rule6
- rump11
- rune6
- ruse5
- sabe7
- scab10
- scar7
- scup11
- sear4
- seep7
- seer4
- sera4
- sere4
- spae7
- spar7
- spec10
- spue8
- spur8
- suba8
- suer5
- supe8
- sura5
- sure5
- tabu8
- tace7
- tape7
- tare4
- tarp7
- tear4
- tepa7
- trap7
- tree4
- true5
- tuba8
- tube8
- unbe9
- upas8
- upby13
- urbs8
- urea5
- urge7
- uric8
- ursa5
- user5
- uvea9
- veep11
- veer8
- vera8
- verb11
- ware7
- warp10
- waur8
- wear7
- weep10
- weer7
- were7
- wrap10
- yare6
- yaup10
- year6
- yuca10
- zebu17