4 letters
- firm10
- firn8
- firs7
- fisc10
- fish9
- fist7
- fits7
- five11
- fixt14
- flee8
- flex15
- floe8
- fobs10
- foci10
- foes7
- fogs9
- foil8
- foin8
- fons8
- fops10
- fora7
- forb10
- ford8
- fore7
- fork11
- form10
- fort7
- foss7
- four8
- foxy16
- foys9
- frae7
- free7
- fret7
- frig9
- frit7
- friz16
- froe7
- frog9
- from10
- frow10
- fubs11
- furs8
- fuse8
- gees6
- gibe9
- gibs9
- gies6
- giro6
- gobs9
- goer6
- goes6
- gore6
- gree6
- hebe9
- heir6
- herb9
- here6
- hero6
- hers6
- hies6
- hire6
- hobs9
- hoer6
- hoes6
- hose6
- ibex14
- ibis7
- ices7
- ides5
- ilex12
- info8
- inro5
- ions5
- ired5
- ires4
- iris4
- irks8
- iron5
- isba7
- isle5
- jeer13
- jees13
- jefe16
- jibe16
- jibs16
- jobs16
- joes13
- keef11
- kefs11
- keir8
- kerb11
- kerf11
- kibe11
- kief11
- kier8
- kifs11
- kirs8
- kobs11
- kois8
- kore8
- kors8
- kris8
- leer5
- lees5
- leis5
- libs8
- lief8
- lier5
- lies5
- life8
- lire5
- lobe8
- lobs8
- lore5
- lose5
- mere7
- mibs10
- mire7
- mirs7
- mise7
- miso7
- mobs10
- more7
- mors7
- nebs8
- neif8
- nibs8
- nixe12
- nobs8
- noes5
- noir5
- nori5
- nose5
- oafs7
- oars4
- obes7
- obey9
- obia7
- obis7
- obit7
- oboe7
- odes5
- offs10
- ogee6
- ogre6
- oils5
- okes8
- oles5
- omer7
- ones5
- opes7
- orbs7
- orby9
- orcs7
- ores4
- orle5
- orts4
- oryx13
- osar4
- oses4
- ours5
- over8
- owes7
- owse7
- oxen12
- oxes11
- oxid12
- oxim14
- oyer6
- oyes6
- peer7
- pees7
- peri7
- peso7
- pier7
- pies7
- piso7
- pois7
- pore7
- pose7
- pree7
- prex14
- prof10
- pros7
- rase4
- rebs7
- recs7
- rede5
- redo5
- reds5
- reed5
- reef7
- reek8
- reel5
- rees4
- refs7
- reft7
- regs6
- reif7