4 letters
- fico10
- fido8
- fids8
- fief10
- fife10
- file8
- filo8
- find9
- fine8
- fink12
- fino8
- fire7
- firm10
- firn8
- firs7
- five11
- fled9
- floe8
- fobs10
- foci10
- foes7
- foil8
- foin8
- fold9
- folk12
- fond9
- food8
- fora7
- forb10
- ford8
- fore7
- fork11
- form10
- fort7
- four8
- frae7
- free7
- fret7
- frig9
- frit7
- friz16
- froe7
- frog9
- from10
- frow10
- fyke13
- gibe9
- gied7
- gird7
- giro6
- goer6
- gore6
- grid7
- heir6
- herb9
- herd7
- hero6
- hide7
- hied7
- hike10
- hire6
- hoed7
- hoer6
- hoke10
- ibex14
- iced8
- idea5
- idem8
- ides5
- idle6
- idol6
- ikon9
- info8
- inro5
- ired5
- ires4
- irid5
- irks8
- iron5
- jerk17
- jibe16
- joke17
- kadi9
- kaif11
- kbar11
- keef11
- kefs11
- keir8
- keno9
- kepi11
- kerb11
- kerf11
- kern9
- keto8
- kibe11
- kids9
- kief11
- kier8
- kifs11
- kike12
- kilo9
- kind10
- kine9
- kino9
- kirk12
- kirn9
- kirs8
- kite8
- knob12
- kobo11
- kobs11
- koel9
- kois8
- kore8
- kors8
- kris8
- kudo10
- lido6
- lied6
- lief8
- lier5
- life8
- like9
- lire5
- lobe8
- lode6
- lord6
- lore5
- merk11
- mike11
- mire7
- mirk11
- mode8
- modi8
- moke11
- more7
- neif8
- nerd6
- nide6
- node6
- nodi6
- noir5
- nori5
- obes7
- obey9
- obia7
- obis7
- obit7
- oboe7
- odea5
- odes5
- odic8
- odor5
- ogre6
- ohed7
- oink9
- okeh10
- okes8
- okra8
- omer7
- oped8
- orad5
- orbs7
- orby9
- ordo5
- ores4
- orle5
- over8
- owed8
- oxid12
- oyer6
- peri7
- perk11
- pied8
- pier7
- pike11
- poke11
- pore7
- pork11
- prod8
- prof10
- raid5
- rake8
- raki8
- read5
- rebs7
- reck11
- redd6
- rede5
- redo5
- reds5
- reed5
- reef7
- reek8
- refs7
- reft7
- reif7
- rein5
- reis4
- rend6