feckless vs. inept
fretful vs. querulous
fretful vs. whiney
fretful vs. whiny
fretful vs. itchy
fidgety vs. fretful
flustered vs. perturbed
flustered vs. rattled
fathomable vs. plumbable
fathomable vs. soundable
fusty vs. standpat
fusty vs. unprogressive
fusty vs. nonprogressive
fusty vs. musty
frowsty vs. fusty
formative vs. shaping
formative vs. plastic
flagrant vs. rank
flimsy vs. unconvincing
flimsy vs. thin
flimsy vs. onionskin
flakey vs. flaky
fallacious vs. inauthentic
fallacious vs. unauthentic
fallacious vs. spurious
fallacious vs. fraudulent
fallacious vs. unsound
flattened vs. planate
fanciful vs. notional
fab vs. fabulous
fabulous vs. mythic
fabulous vs. mythical
fabulous vs. mythologic
fabulous vs. mythological
fragile vs. thin
frail vs. weak
finished vs. ruined
fractious vs. nettlesome
fractious vs. recalcitrant
frank vs. postmark
frothy vs. scintillating
fuddled vs. tight
fictile vs. plastic
fictile vs. pliable
flexible vs. whippy
flexible vs. flexile
flexible vs. pliable
flexible vs. pliant
forcible vs. physical
forceless vs. unforceful
fascinated vs. hypnotized
fascinated vs. hypnotised
fascinated vs. mesmerized
fascinated vs. mesmerised
fascinated vs. spellbound
fascinated vs. transfixed
frustrating vs. frustrative
frustrating vs. thwarting
freelance vs. independent
freelance vs. mercenary
flighty vs. skittish
flighty vs. flyaway
flighty vs. scatterbrained
flatbottom vs. flatbottomed
fledgling vs. unfledged
fledgeling vs. fledgling
fledgling vs. starter
fat vs. fatty
fat vs. rich
fat vs. juicy
fat vs. fatness
fat vs. plump
fashionable vs. stylish
fleet vs. swift
fleet vs. pass
fleet vs. flit
faithless vs. unfaithful
faddish vs. faddy
fleshy vs. heavy
fleshy vs. sarcoid
fallible vs. weak
foolproof vs. unfailing
foolproof vs. goofproof
finical vs. finicky
finical vs. fussy
finical vs. particular
finical vs. picky
fussy vs. grouchy
fussy vs. grumpy
fantastic vs. grotesque
fantastic vs. wondrous
fantastic vs. fantastical
fantastic vs. wild
fantastical vs. grotesque
fogyish vs. stodgy
funny vs. shady
funny vs. odd
funny vs. laughable
funny vs. mirthful
funny vs. risible
finite vs. infinite
fissile vs. fissionable
fit vs. primed
fit vs. set
fit vs. paroxysm
fit vs. scene
fit vs. season
fit vs. harden
fit vs. match
fit vs. outfit
fit vs. tally
fit vs. go
fit vs. meet
fit vs. suit
fledged vs. mature
featherless vs. unfeathered
fledgeless vs. unfledged
felicitous vs. happy
fatless vs. nonfat
fertile vs. rich
fertile vs. prolific
fecund vs. fertile
fresher vs. freshman
freshman vs. starter
flabby vs. soft
flaccid vs. soft
forehand vs. forehanded
fossilised vs. fossilized
fossilized vs. ossified
foreign vs. strange
folksy vs. homespun
fortuitous vs. uncaused
fabricated vs. fictitious
fancied vs. fictitious
fictional vs. fictitious
freehand vs. freehanded
fake vs. juke
fake vs. sham
fake vs. fraud
fake vs. wangle
fake vs. fudge
fake vs. manipulate
fake vs. falsify
fake vs. misrepresent
functional vs. running
functional vs. usable
functioning vs. operation
flagitious vs. heinous
fiendish vs. infernal
flocculent vs. woolly
florid vs. ruddy
fricative vs. strident
fricative vs. spirant
flinty vs. granitic
flint vs. granitic
foaming vs. foamy
foaming vs. frothing
flatulent vs. gassy
frigid vs. polar
frosty vs. snappy
frosty vs. rimed
frosty vs. rimy
flight vs. flying
fell vs. vicious
fell vs. hide
fervent vs. piping
fervid vs. piping
fiery vs. igneous
farcical vs. ridiculous
fire vs. flaming
fiddling vs. little
footling vs. little
fundamental vs. rudimentary
fundamental vs. profound
finable vs. fineable
familial vs. transmissible
fitting vs. meet
flyspeck vs. wee
funereal vs. sepulchral
foster vs. surrogate
foster vs. nurture
figurative vs. nonliteral
figural vs. figurative
farfetched vs. implausible
fortemente vs. pianissimo
found vs. plant
found vs. launch
forfeit vs. sacrifice
forfeit vs. forfeiture
forego vs. forfeit
forfeit vs. waive
forfeit vs. forgo
favored vs. preferred
fleeting vs. fugitive
fleeting vs. momentaneous
fleeting vs. momentary
fugitive vs. runaway
fond vs. partial