4 letters
- fids8
- fief10
- fife10
- figs9
- file8
- fils8
- fine8
- fins8
- fire7
- firm10
- firn8
- firs7
- fisc10
- fish9
- fist7
- fits7
- five11
- flee8
- flub12
- flue9
- flus9
- fobs10
- foes7
- forb10
- fore7
- four8
- frae7
- free7
- fret7
- frig9
- frit7
- friz16
- froe7
- frug10
- fubs11
- fuci11
- fuds9
- fuel9
- fugs10
- fuji17
- fume11
- funs9
- furl9
- furs8
- fury10
- fuse8
- fuss8
- fuze17
- gees6
- ghee8
- ghis8
- gibe9
- gibs9
- gies6
- gree6
- grub10
- grue7
- gush9
- habu10
- haes6
- hair6
- hare6
- hear6
- hebe9
- heed7
- heel7
- heft9
- hehs8
- heil7
- heir6
- heme9
- hems9
- hens7
- herb9
- herd7
- here6
- herl7
- herm9
- hern7
- hero6
- hers6
- hest6
- hets6
- hews9
- hide7
- hied7
- hies6
- hike10
- hins7
- hips9
- hire6
- hisn7
- hiss6
- hist6
- hits6
- hive10
- hobs9
- hoer6
- hoes6
- hose6
- hour7
- hubs10
- hued8
- hues7
- huff13
- huge9
- hugs9
- huic10
- hums10
- huns8
- hurl8
- hurt7
- hush9
- husk11
- huts7
- ibex14
- ibis7
- ices7
- ichs9
- ides5
- ired5
- ires4
- iris4
- irks8
- isba7
- isle5
- jeer13
- jees13
- jefe16
- jehu16
- jibe16
- jibs16
- jube17
- keef11
- kefs11
- keir8
- kerb11
- kerf11
- khis10
- kibe11
- kief11
- kier8
- kifs11
- kirs8
- kris8
- kues9
- leer5
- lees5
- lehr7
- leis5
- libs8
- lief8
- lier5
- lies5
- lieu6
- life8
- lire5
- lube9
- lues6
- lure6
- lush8
- mere7
- mesh9
- mibs10
- mire7
- mirs7
- mise7
- mure8
- murr8
- muse8
- mush10
- nebs8
- neif8
- nibs8
- nubs9
- obes7
- obis7
- orbs7
- ores4
- ours5
- peer7
- pees7
- pehs9
- peri7
- pfui11
- phis9
- pier7
- pies7
- pish9
- pree7
- pubs11
- pure8
- puri8
- purr8
- purs8
- push10
- rare4
- rase4
- rash6
- rear4