4 letters
- lyre7
- merk11
- merl8
- muck15
- mule9
- mure8
- murk12
- neck12
- neuk10
- nuke10
- nurl7
- orle5
- peck14
- perk11
- pleb11
- puce11
- puck15
- puke12
- pule9
- pure8
- purl9
- race7
- rack11
- rake8
- rale5
- real5
- rebs7
- reck11
- recs7
- reek8
- reel5
- rely7
- rice7
- rick11
- riel5
- rile5
- robe7
- rock11
- role5
- roue5
- rube8
- rubs8
- ruby10
- ruck12
- rude6
- rued6
- ruer5
- rues5
- rule6
- ruly8
- rune6
- ruse5
- rusk9
- ryke10
- slub9
- slue6
- slur6
- suck12
- suer5
- sulk10
- sure5
- trek8
- true5
- tube8
- tuck12
- tule6
- turk9
- ukes9
- unbe9
- urbs8
- urea5
- urge7
- uric8
- user5
- verb11
- yelk11
- yerk10
- yeuk11
- yuck14
- yule8
- zebu17
- zerk17