4 letters
- mend9
- menu9
- meou8
- mere7
- merk11
- merl8
- mice10
- mire7
- mode8
- more7
- moue8
- much13
- muck15
- muds9
- mule9
- mura8
- mure8
- murk12
- murr8
- muse8
- mute8
- nerd6
- neum9
- nude7
- numb12
- nurd7
- omer7
- perm10
- puce11
- pure8
- race7
- read5
- ream7
- rebs7
- reck11
- recs7
- redd6
- rede5
- redo5
- reds5
- reed5
- rems7
- rend6
- rice7
- ride5
- rime7
- robe7
- rode5
- roue5
- rube8
- rubs8
- ruby10
- ruck12
- rudd7
- rude6
- rued6
- ruer5
- rues5
- rule6
- rump11
- rums8
- rune6
- ruse5
- scud9
- scum11
- sued6
- suer5
- surd6
- sure5
- term7
- true5
- tube8
- turd6
- umbo11
- unbe9
- unde7
- urbs8
- urds6
- urea5
- urge7
- uric8
- used6
- user5
- verb11
- zebu17