4 letters
- fino8
- fire7
- firm10
- firn8
- firs7
- five11
- flak12
- flaw11
- flea8
- fled9
- flee8
- flew11
- flex15
- fley10
- flic11
- flip11
- flit8
- floc11
- floe8
- flog10
- flop11
- flow11
- flue9
- foal8
- foci10
- foes7
- foil8
- foin8
- fold9
- folk12
- fond9
- food8
- fool8
- fora7
- forb10
- ford8
- fore7
- fork11
- form10
- fort7
- foul9
- four8
- fowl11
- frae7
- free7
- fret7
- frig9
- frit7
- friz16
- froe7
- frog9
- from10
- frow10
- fuel9
- furl9
- fyke13
- geld8
- gied7
- gild8
- gird7
- girl7
- giro6
- gled8
- glow10
- goer6
- gold8
- golf10
- gore6
- gowd10
- gowk13
- grew9
- grid7
- grow9
- heil7
- heir6
- held8
- helo7
- herd7
- herl7
- hero6
- hide7
- hied7
- hike10
- hire6
- hoed7
- hoer6
- hoke10
- hold8
- hole7
- holk11
- howe9
- howf12
- howk13
- howl10
- iced8
- idea5
- idem8
- ides5
- idle6
- idly8
- idol6
- idyl8
- ikon9
- ilea5
- ilex12
- ilka9
- ilks9
- info8
- inro5
- ired5
- ires4
- irid5
- irks8
- iron5
- isle5
- jerk17
- joke17
- jole14
- jowl17
- kadi9
- kaif11
- kail9
- kale9
- keef11
- keel9
- kefs11
- keir8
- kelp12
- keno9
- kepi11
- kerb11
- kerf11
- kern9
- keto8
- kibe11
- kids9
- kief11
- kier8
- kifs11
- kike12
- kill10
- kiln10
- kilo9
- kilt9
- kind10
- kine9
- kino9
- kirk12
- kirn9
- kirs8
- kite8
- kiwi11
- knew12
- know12
- koel9
- kohl11
- kois8
- kola9
- kolo9
- kore8
- kors8
- kris8
- kudo10
- lade6
- laid6
- lair5
- lake9
- lard6
- lari5
- lark9
- lead6
- leaf8
- leak9
- lear5
- leek9
- leer5
- left8
- lehr7
- leis5
- leke9
- leks9
- leku10
- lend7
- leno6
- leud7
- levo9
- lewd9
- liar5
- lice8
- lick12
- lido6
- lids6
- lied6
- lief8
- lien6
- lier5
- lies5
- lieu6
- life8
- lift8