4 letters
- grit6
- grub10
- grue7
- grum10
- guar7
- gude8
- guff13
- guid8
- gulf11
- guru8
- gybe11
- gyre8
- gyri8
- hebe9
- heir6
- herb9
- here6
- hire6
- huff13
- huge9
- ibex14
- iffy12
- iglu8
- ired5
- ires4
- jeer13
- jefe16
- jibe16
- jiff19
- jube17
- keef11
- keir8
- kerb11
- kerf11
- kibe11
- kief11
- kier8
- leer5
- lief8
- lier5
- lieu6
- life8
- lire5
- lube9
- luff12
- luge8
- lure6
- mere7
- miff13
- mire7
- muff14
- mure8
- neif8
- ogee6
- ogre6
- peer7
- peri7
- pfui11
- pier7
- pree7
- prig9
- puff14
- pure8
- puri8
- raff10
- rage6
- ragi6
- rebs7
- rede5
- reed5
- reef7
- reek8
- reel5
- rees4
- refs7
- reft7
- regs6
- reif7
- rein5
- reis4
- rete4
- ribs7
- rice7
- ride5
- riel5
- rife7
- riff10
- rifs7
- rift7
- rigs6
- rile5
- rime7
- ring7
- ripe7
- rise4
- rite4
- rive8
- robe7
- roue5
- rube8
- rubs8
- ruby10
- rude6
- rued6
- ruer5
- rues5
- ruff11
- ruga7
- rugs7
- ruin6
- rule6
- rune6
- rung8
- ruse5
- seer4
- seif7
- sere4
- serf7
- sire4
- suer5
- sure5
- surf8
- teff10
- tier4
- tiff10
- tire4
- tree4
- tref7
- trig6
- true5
- trug7
- tube8
- tuff11
- turf8
- unbe9
- urbs8
- urea5
- urge7
- uric8
- user5
- veer8
- verb11
- vibe11
- vier8
- weer7
- weir7
- were7
- wife10
- wire7
- zebu17