4 letters
- fits7
- five11
- flic11
- floc11
- floe8
- fobs10
- foci10
- foes7
- fogs9
- foil8
- foin8
- folk12
- fons8
- fops10
- fora7
- forb10
- ford8
- fore7
- fork11
- form10
- fort7
- foss7
- four8
- foys9
- frae7
- free7
- fret7
- frig9
- frit7
- friz16
- froe7
- frog9
- from10
- frow10
- fuci11
- fuck15
- furs8
- fuse8
- fuss8
- fyce12
- fyke13
- geck13
- gies6
- giro6
- goer6
- goes6
- gore6
- heck13
- heir6
- hero6
- hers6
- hick13
- hies6
- hike10
- hire6
- hiss6
- hock13
- hoer6
- hoes6
- hoke10
- hose6
- iced8
- ices7
- ichs9
- icky13
- icon8
- ides5
- ikon9
- ilks9
- info8
- inks9
- inro5
- ions5
- ired5
- ires4
- iris4
- irks8
- iron5
- isle5
- isms7
- jerk17
- jess13
- jock20
- joes13
- joke17
- joss13
- kaes8
- kafs11
- kaif11
- keas8
- keck15
- keef11
- kefs11
- kegs10
- keir8
- keno9
- kens9
- kepi11
- keps11
- kerb11
- kerf11
- kern9
- keto8
- keys10
- khis10
- kibe11
- kick15
- kids9
- kief11
- kier8
- kifs11
- kike12
- kilo9
- kine9
- kino9
- kins9
- kips11
- kirk12
- kirn9
- kirs8
- kiss8
- kist8
- kite8
- kits8
- koas8
- kobs11
- koel9
- kois8
- kops11
- kore8
- kors8
- koss8
- kris8
- kues9
- leis5
- leks9
- less5
- lice8
- lick12
- lief8
- lier5
- lies5
- life8
- like9
- lire5
- loci8
- lock12
- lore5
- lose5
- loss5
- merk11
- mess7
- mice10
- mick14
- mike11
- mire7
- mirk11
- mirs7
- mise7
- miso7
- miss7
- mock14
- mocs10
- moke11
- more7
- mors7
- mosk11
- moss7
- neck12
- neif8
- ness5
- nice8
- nick12
- nock12
- noes5
- noir5
- nori5
- nose5
- oafs7
- oaks8
- oars4
- obes7
- obis7
- ocas7
- odes5
- odic8
- offs10
- ogre6
- oils5
- oink9
- okas8
- okeh10
- okes8
- okra8
- oles5
- omer7
- once8
- ones5
- opes7
- orbs7