142 Adjectives That Start With F
F has an unusual number of ways to call someone silly. 7 of the 142 adjectives below describe a person who has got it wrong — fanciful, fatuous, flighty, flippant, foolhardy, foolish and frivolous — and each names a different fault. That is worth having: most of the time a writer reaches for silly and stops there.
This page lists 142 adjectives that start with F, sorted by the job you need one for rather than by whether it is a compliment. The positive-and-negative table further down separates the praise from the criticism, since sorting by job mixes them together.
Two entries are worth approaching carefully. Fulsome carries two live senses that pull opposite ways, and fortuitous means by chance, whatever its resemblance to fortunate suggests. Both are in the five-row confusion table at the end, along with flammable and inflammable, where the mistake can actually hurt someone.
All 142 adjectives at a glance
facetious, facile, faint, faint-hearted, fair, faithful, fake, fallacious, fallible, fallow, false, famous, fanatical, fanciful, fancy, faraway, farcical, fashionable, fastidious, fatal, fatherly, fatuous, fearful, fearless, feckless, fecund, fed up, feeble, feisty, felicitous, feral, fertile, fervent, fervid, fetching, fetid, feverish, fibrous, fickle, fictional, fictitious, fiduciary, fiendish, fierce, fiery, filial, filthy, final, fine, finicky, finite, fishy, fit, fixed, flabbergasted, flabby, flaccid, flagrant, flaky, flamboyant, flammable, flashy, flat, flawless, fledgling, fleeting, flexible, flighty, flippant, floppy, floral, florid, fluffy, fluid, flustered, foamy, foggy, fond, foolhardy, foolish, foolproof, footloose, foppish, forbidden, forbidding, forceful, foreign, foremost, forensic, foreseeable, forgetful, forgiving, forlorn, formal, formidable, forthcoming, forthright, fortuitous, foul-mouthed, fractious, fragile, fragrant, frail, frangible, frank, frantic, fraudulent, fraught, free, freewheeling, frenetic, frequent, fresh, fretful, friendly, frightened, frilly, frisky, frivolous, frosty, frothy, frozen, frugal, fruitful, frumpy, frustrated, fulgent, full, fulsome, functional, fundamental, funereal, fungible, funky, funny, furious, furry, furtive, fussy, fusty, futile, fuzzy
For people
49 words for describing someone, and the section where the letter is at its most precise. Fearless is a compliment and foolhardy is the same courage without the judgement; forthright volunteers the awkward part unasked, which frank does not promise; and fastidious, finicky and fussy are three grades of the same fault rather than a scale from praise to complaint — Merriam-Webster builds “or excessively” into every sense of fastidious.
| Adjective | What it means |
|---|---|
| faint-hearted | lacking courage or resolution |
| fair | even-handed, and giving each side its due |
| faithful | staying with a person or a cause over time |
| fallible | capable of being wrong, as everyone is |
| famous | widely known, and known by name |
| fanatical | holding a belief past the point of reason |
| fanciful | given to ideas with no grounding in anything |
| fashionable | following what is currently in style |
| fastidious | exacting about detail, often excessively so |
| fatherly | protective and kindly, as a father is expected to be |
| fearful | afraid, or causing fright |
| fearless | meeting danger without any sign of fright |
| feckless | irresponsible, and unlikely to improve |
| feisty | small and spirited, and willing to argue |
| fervent | warm in feeling, and steady about it |
| fetching | attractive, and pleasing to look at |
| fickle | changing loyalty or opinion without warning |
| fiendish | wickedly cruel, or extremely difficult |
| fierce | aggressive, and frightening with it |
| fiery | quick to flare into anger |
| filial | owed by a son or daughter to a parent |
| finicky | refusing anything not exactly right |
| flabby | soft and sagging from lack of tone |
| flamboyant | showy, and enjoying being looked at |
| flighty | unreliable through never settling on anything |
| flippant | treating a serious thing lightly |
| foolhardy | bold in a way that ignores obvious risk |
| foolish | showing poor sense |
| footloose | having no ties, and free to move about |
| forceful | pressing a point strongly and getting it accepted |
| foremost | first in rank or importance |
| forgetful | apt to let things slip out of mind |
| forgiving | willing to stop holding a wrong against someone |
| formidable | impressive enough to be daunting |
| forthcoming | about to appear or become available; also, open and candid |
| forthright | volunteering the awkward fact before being asked |
| foul-mouthed | given to coarse language |
| frail | weakened by age or illness |
| frank | blunt where others would soften |
| fraudulent | obtained or done by deceit |
| freewheeling | unconstrained by rules or plans |
| friendly | warm and easy toward other people |
| frisky | lively, and inclined to play |
| frivolous | not serious about things that deserve it |
| frugal | careful with money, and content with little |
| frumpy | dowdy, and unattractively dressed |
| funny | able to make other people laugh |
| furtive | acting as though not wanting to be seen |
| fussy | complaining over trifles, and hard to satisfy |
For places and things
The largest section, at 55 words, covering texture, condition, temperature and material. Fragile and frail are the pair to keep apart: things are fragile, people are frail, and a frail thing is one that has weakened rather than one that was always breakable.
| Adjective | What it means |
|---|---|
| faint | barely perceptible to the senses |
| fake | a counterfeit of a real thing |
| fallow | left unsown for a season, of land |
| false | not true, or not genuine |
| fancy | elaborate rather than plain |
| faraway | distant in space, or unfocused in expression |
| fatal | causing death, or ruinous |
| feeble | weak enough to be pitied |
| fertile | able to produce crops or offspring in abundance |
| fetid | smelling strongly and unpleasantly of decay |
| fibrous | made of threadlike strands |
| fictional | invented for a story |
| filthy | disgustingly dirty |
| final | coming last, and settling the matter |
| fine | of high quality, or very thin |
| finite | having limits that can be reached |
| fishy | smelling of fish, or arousing suspicion |
| fit | in good physical condition, or suitable for a purpose |
| fixed | fastened in place, or settled in advance |
| flaky | coming away in thin light pieces |
| flammable | catching fire easily |
| flashy | showy beyond the bounds of good taste |
| flat | level, or without any rise in it |
| flawless | with no blemish or imperfection anywhere |
| fleeting | lasting only a moment |
| flexible | bending without breaking, or open to change |
| floppy | hanging loose for want of stiffness |
| floral | patterned with flowers |
| fluffy | light and soft with air through it |
| fluid | flowing, or able to change shape |
| foamy | full of bubbles all the way through |
| foggy | thick with suspended water, or unclear |
| foolproof | simple enough that it cannot go wrong |
| forbidden | not allowed by rule or law |
| forbidding | grim and difficult to approach |
| foreign | belonging to another country, or out of place |
| foreseeable | able to be predicted from what is known now |
| formal | following the accepted rules of form |
| fragile | easily broken, and needing care |
| fragrant | having a sweet or pleasant smell |
| free | not held, not owned, and not paid for |
| frequent | happening at short intervals |
| fresh | newly made, and not yet stale |
| frilly | edged with gathered decorative trim |
| frosty | covered in ice crystals, or coldly unfriendly |
| frothy | carrying a light head on top, or slight in substance |
| frozen | hardened by cold, or unable to move |
| fruitful | producing good results |
| full | holding as much as it can |
| functional | working as intended, with nothing spare |
| fundamental | forming the base everything else rests on |
| funereal | gloomy and slow, as at a burial |
| funky | unconventionally stylish, or having a strong stale smell |
| furry | covered in soft animal hair |
| fuzzy | covered in fine fluff, or blurred at the edges |
For feelings and mood
States rather than settled dispositions, which is why the people section holds fiery and this one holds furious. Fraught is the most useful of them, because it describes a situation and the people inside it at the same time.
| Adjective | What it means |
|---|---|
| fed up | tired of it, and no longer hiding the fact |
| feverish | hot and restless with fever, or agitated like it |
| flabbergasted | astonished past the point of speech |
| flustered | agitated, and losing track of what one was doing |
| fond | warmly attached, at the moment of feeling it |
| forlorn | abandoned and unhappy about it |
| frantic | wild with worry or haste |
| fraught | tense, and carrying trouble with it |
| fretful | restless and irritable, usually from discomfort |
| frightened | afraid, at the moment of being afraid |
| frustrated | blocked from doing what you meant to do |
| furious | extremely angry |
Rare and unusual
Formal, technical and little-used, though several deserve better. Felicitous and fractious are ordinary enough to reach for; frangible is here because engineering needs it and nothing else will do.
| Adjective | What it means |
|---|---|
| facetious | joking about something that calls for seriousness |
| facile | easy in a way that suggests it was not thought through |
| fallacious | resting on unsound reasoning |
| farcical | absurd enough to be ridiculous |
| fatuous | silly and self-satisfied with it |
| fecund | richly productive of offspring or of ideas |
| felicitous | well chosen, and pleasing because of it |
| feral | gone wild after living tame |
| fervid | hot with feeling, and showing it suddenly |
| fictitious | invented, especially to deceive |
| fiduciary | of or resting on a relationship of trust |
| flaccid | limp, and without the stiffness it should have |
| flagrant | so bad it cannot be overlooked |
| fledgling | newly established and not yet sure of itself |
| florid | overelaborate, or flushed red |
| foppish | fussily concerned with dress, of a man |
| forensic | relating to courts and the evidence used in them |
| fortuitous | happening by chance |
| fractious | irritable, and inclined to make trouble |
| frangible | readily broken, without any suggestion of weakness |
| frenetic | fast and disordered |
| fulgent | shining brightly, in poetic use |
| fulsome | abundant and generous, or excessive to the point of insincerity |
| fungible | interchangeable with any other unit of the same kind |
| fusty | stale-smelling from being shut up too long |
| futile | certain to achieve nothing |
Positive and negative at a glance
Sorting by job rather than by tone means compliments and criticisms sit side by side above. Here a selection of them is separated into three columns, using words already defined on this page — and the third column is the interesting one.
| Clearly positive | Clearly negative | Depends on the sentence |
|---|---|---|
| fair, faithful, fearless, forgiving, forthright, friendly, frugal, felicitous | fanatical, feckless, fickle, foolish, fraudulent, frivolous, fatuous, futile | fervent, fierce, formal, formidable, forceful, frank, flamboyant, fastidious |
The third column is where the letter is most interesting. Formidable is admiring about an opponent and daunting about a colleague. Fastidious praises a jeweller and criticises a dinner guest, and the noun beside it decides which.
Using them in a sentence
- A frank answer from a fastidious witness is worth two careful ones.
- The room was fusty, the light faint, and the welcome frosty.
- He was fearless on the first attempt and merely foolhardy on the fourth.
- She looked flustered for a moment, then entirely formidable.
- A fleeting advantage, taken by someone frugal enough to have kept something back.
- The plan was fanciful rather than fraudulent, a distinction its author kept making.
Words people get wrong
| Pair | The difference that matters |
|---|---|
| flammable / inflammable | The pair where the mistake can hurt someone. They mean the same thing: both mean easily set alight. The in- is not the negative prefix; Merriam-Webster traces it to Latin inflammare, to inflame, where in- means in or into. In the early twentieth century firefighters worried that people might read inflammable as meaning fireproof, and adopted flammable and nonflammable as the safety labels. The opposite of both is nonflammable. |
| fortuitous / fortunate | Fortuitous means happening by chance, with no promise the chance was a good one. Fortunate means lucky. Merriam-Webster has recorded the lucky sense of fortuitous for some seventy years and calls it standard, while noting that critics still disdain it — so chance or lucky remains the safer word in careful writing. Neither is on this page. |
| fulsome / full | The trap is that fulsome has two live senses pulling opposite ways. Merriam-Webster gives its chief sense as copious, or generous in amount and spirit — and also records the older revived sense of excessive to the point of insincerity. So fulsome praise may be warm or may be sneering, and the reader decides. That ambiguity, not a negative meaning, is what makes the word unsafe. Full is not on this page. |
| flaunt / flout | Neither is an adjective and neither is on this page, but they are the F-pair most often swapped. To flaunt is to display something showily; to flout is to break a rule openly. You flout the law and flaunt your wealth, and the error runs almost entirely one way. |
| farther / further | Style guides teach a split — farther for physical distance, further for degree — but Merriam-Webster records the two as interchangeable in the distance sense, and neither it nor Oxford marks either form British or American. The asymmetry that is real runs one way only: further alone works as an adjective meaning additional, as an adverb meaning to a greater degree, and as a verb. Farther does none of those. |
Related guides
- Adjectives for forests — where fertile, foggy and fecund do their closest work.
- Adjectives for fabric — expands fibrous, fluffy, frilly and floral.
- Adjectives for falling — for the movement words this page only touches.
- Adjectives for fashion — where flamboyant, foppish and frumpy get used.
- Adjectives for a farm — pairs with fallow, fertile and fresh.
- Adjectives for autumn — the seasonal set, which this letter serves better than most.
Checked against Merriam-Webster, the Chicago Manual of Style and the AP Stylebook. Spotted an error? Tell us — see our editorial policy.
