- folksong
- folk mind
- folk art
- family line
- Fortran compiler
- FORTRAN program
- fifty dollar bill
- five dollar bill
- flier
- flyer
- financial statement
- field_grade officer
- field_sequential color television system
- false witness
- foul_up
- fuckup
- firebird
- flybridge
- flycatching warbler
- flora
- fauna
- fry
- foster_child
- foster child
- fosterling
- foundling hospital
- finished
- fare increase
- freethinking
- feminism
- fellow
- felly
- figurer
- floorwalker
- floor wax
- flooring
- funfair
- filch
- furniture maker
- First Lord of the Treasury
- funicular
- funicular railway
- fanwort
- flowering tree
- frailness
- frailty
- feebleness
- family cactaceae
- feather ball
- fig moth