- First-born
- First-class
- First-rate
- Fished
- Fishes
- Fishtail
- Farm-hand
- Far-off
- Functions
- Flabbily
- Father-figure
- Flared
- Fatiguing
- Favoring
- Fault-finding
- Formic
- Feather-brained
- Forming
- Feather-bed
- Flinching
- Flicking
- Fortune-teller
- Forty-five
- Forty-eighth
- Forty-six
- Feeble-minded
- Forward-looking
- Flip-flap
- Foundress
- Founder-member
- Foul-mouthed
- Fountain-head
- Four-letter word
- Four-footed
- Floored
- Four-in-hand
- Four-pounder
- Fox-terrier
- Flown
- Flurried
- Fly-by-night
- Folk-song
- Folk-tale
- Freeborn
- Freer
- Free-will
- Frequenting
- Facilitatory
- Fail-safe