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