- F.B.I. (Federal Bureau of Investigations)
- fabric
- fabricate
- fabulous
- facade
- face fell
- factory
- faculties
- fad
- fade
- fail
- failure
- fairway
- falcon
- faltering
- familiarity
- famished
- fang
- fangs
- fantasy
- farfetched
- fashion
- fashionable
- fatal
- fate
- fathom
- fatigue
- fawn
- fawn over
- fearless
- feasible
- feat
- features
- fed up with
- feel the squeeze
- feint
- feisty
- feline
- fellowship
- felon
- ferocious
- fertilizer
- fervidly
- fetching
- fiasco
- fibbing
- fiery
- figure
- figure out
- finale
- finance
- fingerprints
- fire escape
- fire extinguisher
- firmly
- fish hook
- fish tank
- fistful
- flabbergasted
- flagrant
- flailed
- flailing
- flank
- flap jack
- flashed
- flashed out
- flashy
- flask
- flat tire
- flatbed truck
- flatter
- flawed
- flawless
- flecked
- fled
- fledgling
- fleeing
- fleet
- fleeting
- flicker
- flimsy
- flinch
- flip through
- flirt
- flirtatious
- flitted
- float
- flop
- florid
- flu
- fluid
- fluke
- flung
- fluorescent
- flurry
- flustered
- foe
- foes
- folding screen
- fondly
- fondness
- foolishness
- forbid
- forehead
- foreign
- foreman
- foresight
- foretold
- forfeit
- forged
- forging
- forked tongue
- formidable
- formulate
- forthrightly
- fortress
- fortunately
- foster family
- foul
- fowl
- fragile
- framed
- franchise
- frantic
- frantically
- freaked out
- freckles
- free
- free press
- free speech
- free-for-all
- freezing
- frenzy
- fretfully
- fretting
- frigid
- frill
- frilly
- fringe
- frolic
- frown
- froze
- fruitful
- fruitlessly
- frumpy
- frustrated
- fugitive
- full nelson
- fumbled
- fuming
- fund
- furious
- furiously
- furnace
- furniture
- furrowed
- furtive
- furtively
- fury
- fusing
- fuss
- fuss over
- fussy
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| A furnace for making glass. | ||
| A thing that can make warm air to heat a building by gas or oil burning inside it. Some furnaces are used to make things out of metal or glass. | ||