4 letters
- orby9
- orca7
- orle5
- oyer6
- race7
- racy9
- rail5
- rain5
- rale5
- rani5
- real5
- rein5
- rely7
- rial5
- rice7
- riel5
- rile5
- rill6
- roan5
- robe7
- roil5
- role5
- roll6
- roue5
- rube8
- ruby10
- ruin6
- rule6
- ruly8
- rune6
- ulan7
- ulna7
- unai6
- unbe9
- unci9
- unco9
- urea5
- uric8
- yare6
- yarn7
- yean7
- year6
- yell8
- yill8
- yoni7
- yore6
- your7
- yuan8
- yuca10
- yule8