- fingerling
- finished
- fiord
- fireless
- fireworks
- firing squad
- firm
- firmware
- first born
- first floor
- first lesson
- first name
- first offender
- fish-spawn
- fishing basket
- fishing story
- fishy
- fissure
- fist
- fistfight
- fistula
- fitness
- fitty
- five feet
- five musical instruments
- five sections
- five senses
- fix
- fixated
- fixation
- fixed
- fizz
- fizzle
- flabby
- flag of convenience
- flag-hoisting
- flagellate
- flagitiously
- flakes of rice
- flaky
- flame thrower
- flannel
- flashback
- flat fish
- flat racing
- flatboat
- flattery
- flatulence
- flatulent
- flaunt
- flavouring
- flay
- fleecy
- fleeing for safety
- flesh pot
- flexibility
- flexibly
- flibbertigibbet
- flies
- flight
- flight sergeant
- flimsy
- flip-flop
- flirtatious
- flit
- float around
- floatation
- flog a dead horse
- flong
- flood-plain
- floor level
- flop back
- floppy
- floppy disc
- florid
- florist
- flow of saliva
- flower carpet
- flower people
- flower vine
- flowery
- flowing water
- flu
- fluctuate
- fluent
- fluid
- flummox
- flunkey
- fluoridation
- flurry
- fly
- fly a kite
- fly boat
- flyer, flier
- flying visit
- flysheet
- foam rubber
- foamy
- fob
- focal length