frivolous synonym | Thesaurus.com

Main Entry:	frivolous
Part of Speech:	adjective
Definition:	trivial, silly
Synonyms:	barmy, childish, dizzy, empty-headed, facetious, featherbrained, flighty, flip, flippant, foolish, gay, giddy, harebrained, idiotic, idle, impractical, juvenile, light, minor, niggling, paltry, peripheral, petty, playful, pointless, puerile, scatterbrained, senseless, shallow, sportive, superficial, tongue-in-cheek*, unimportant, volatile, whimsical, ill-considered, light-minded, nonserious, not serious, unprofound
Antonyms:	grave, mature, sensible, serious, solemn, thoughtful, wise

* = informal/non-formal usage

Main Entry:	aimless
Part of Speech:	adjective
Definition:	having no goal
Synonyms:	accidental, any which way, blind, capricious, careless, casual, chance, desultory, erratic, fanciful, fickle, flighty, fortuitous, frivolous, haphazard, heedless, hit-or-miss*, indecisive, indiscriminate, irresolute, pointless, purposeless, random, shiftless, stray, thoughtless, unavailing, unplanned, unpredictable, vagrant, wandering, wanton, wayward, bits-and-pieces, directionless, drifting, fits and starts, goalless, objectless, undirected, unguided
Antonyms:	determined, directed, pointed, purposeful, resolute, goal-oriented, motivated

* = informal/non-formal usage

Main Entry:	childish
Part of Speech:	adjective
Definition:	immature, silly
Synonyms:	adolescent, baby, babyish, callow, childlike, foolish, frivolous, green, infantile, innocent, jejune, juvenile, kid stuff*, naive, puerile, unsophisticated, young, youthful, infantine
Notes:	childlike refers to a person's temperament, whereas childish refers to a person's behavior
Antonyms:	adult, mature, sensible, serious, wise

* = informal/non-formal usage

Main Entry:	empty-headed
Part of Speech:	adjective
Definition:	flighty, scatterbrained
Synonyms:	brainless, dizzy, featherbrained, frivolous, giddy, harebrained, ignorant, illiterate, inane, silly, skittish, stupid, uneducated, unschooled, untaught, vacant, vacuous, know-nothing
Antonyms:	cognizant, intelligent, sensible, slick, smart

Main Entry:	facetious
Part of Speech:	adjective
Definition:	tongue-in-cheek, kidding
Synonyms:	amusing, blithe, capering, clever, comic, comical, droll, dry, fanciful, farcical, flip*, flippant, frivolous, funny, gay, humorous, indecorous, ironic, irreverent, jesting, jocose, jocular, joking, joshing, laughable, ludicrous, merry, not serious, playful, pleasant, pulling one's leg, punning, putting one on, ridiculous, salty, sarcastic, satirical, smart, sportive, sprightly, waggish, whimsical, wisecracking, witty, wry
Antonyms:	formal, grave, serious, unfunny

* = informal/non-formal usage

Main Entry:	fickle
Part of Speech:	adjective
Definition:	vacillating, blowing hot and cold
Synonyms:	arbitrary, capricious, changeable, cheating, faithless, fitful, flighty, frivolous, inconstant, irresolute, mercurial, mutable, temperamental, ticklish, two-timing, unfaithful, unpredictable, unstable, unsteady, untrue, variable, volatile, whimsical, coquettish, double-crossing, lubricious, quicksilver, sneaking, yo-yo
Antonyms:	aware, cognizant, constant, faithful, reliable, stable, steady

Main Entry:	flighty
Part of Speech:	adjective
Definition:	fickle, irresponsible
Synonyms:	capricious, changeable, dizzy, effervescent, empty-headed, featherbrained, frivolous, giddy, harebrained*, impetuous, impulsive, inconstant, lightheaded, lively, mercurial, scatterbrained, silly, thoughtless, unbalanced, unstable, unsteady, volatile, whimsical, wild, airheaded, birdbrained, bubbleheaded, dingbat, dingdong, gaga, twit
Antonyms:	responsible

* = informal/non-formal usage

Main Entry:	flippant
Part of Speech:	adjective
Definition:	irreverent
Synonyms:	brassy, breezy, cheeky, cocky, disrespectful, flighty, flip, fresh, frivolous, glib, impertinent, impudent, insolent, nervy, offhand, pert, playful, rude, sassy, smart*, superficial, lippy, smart-alecky
Antonyms:	courteous, respectful, reverent, serious

* = informal/non-formal usage

Main Entry:	giddy
Part of Speech:	adjective
Definition:	silly, impulsive
Synonyms:	brainless, capricious, careless, changeable, dizzy, empty-headed, erratic, fickle, flighty, frivolous, heedless, inconstant, irresolute, irresponsible, lightheaded, punchy, reckless, scatterbrained, skittish, slaphappy, swimming, thoughtless, unbalanced, unsettled, unstable, unsteady, vacillating, volatile, whimsical, whirling, wild, woozy*, bemused, bubbleheaded, changeful, ditzy, flustered, gaga, reeling
Antonyms:	calm, careful, level-headed, sensible, serious

* = informal/non-formal usage

Main Entry:	harebrained
Part of Speech:	adjective
Definition:	stupid, unthinking
Synonyms:	absurd, asinine, barmy, bizarre, careless, changeable, crazy, dizzy, empty-headed, featherbrained, flighty, foolish, frivolous, giddy, half-baked, heedless, inane, irresponsible, loony, mindless, preposterous, rash, reckless, scatterbrained, unstable, unsteady, wacky*, wild, rattlebrained
Antonyms:	brainy, intelligent, reasonable, sensible, smart, thoughtful

* = informal/non-formal usage

Main Entry:	inane
Part of Speech:	adjective
Definition:	stupid
Synonyms:	absurd, asinine, daft, empty, fatuous, flat, foolish, frivolous, futile, harebrained, idiotic, illogical, innocuous, insipid, jejune, laughable, meaningless, mindless, pointless, puerile, ridiculous, sappy, senseless, silly, trifling, unintelligent, vacant, vacuous, vain, vapid, weak, wishy-washy*, worthless, imbecilic
Antonyms:	bright, intelligent, smart

* = informal/non-formal usage

Main Entry:	light-headed
Part of Speech:	adjective
Definition:	silly; feeling faint
Synonyms:	changeable, delirious, dizzy, empty, featherbrained, fickle, flighty, flippant, foolish, frivolous, giddy, harebrained, hazy, punchy, rocky, scatterbrained, shallow, superficial, swimming, tired, trifling, vertiginous, whirling, woozy*, gaga, reeling, swimmy
Antonyms:	healthy, sober, ok

* = informal/non-formal usage

Main Entry:	madcap
Part of Speech:	adjective
Definition:	crazy, impulsive
Synonyms:	brash, foolhardy, foolish, frivolous, harebrained*, heedless, hotheaded, ill-advised, imprudent, incautious, inconsiderate, lively, rash, reckless, stupid, thoughtless, wild
Antonyms:	reasonable, sane

* = informal/non-formal usage

Main Entry:	petty
Part of Speech:	adjective
Definition:	trivial, insignificant
Synonyms:	base, casual, cheap, contemptible, frivolous, inferior, irrelevant, junior, lesser, light, little, lower, measly, minor, narrow-minded, negligible, niggling, paltry, peanut, picayune, piddling, scratch, secondary, shabby, shallow, slight, small, small-minded, subordinate, trifling, two-bit, unimportant, inconsequent, inconsiderable, inessential, nickel-and-dime, penny-ante, pettifogging, shoestring*
Antonyms:	consequential, important, major, necessary, prominent, significant, useful

* = informal/non-formal usage

Main Entry:	picayune
Part of Speech:	adjective
Definition:	trivial
Synonyms:	diminutive, everyday, frivolous, immaterial, incidental, inconsequential, insignificant, irrelevant, little, meager, mean, meaningless, minor, minute, negligible, nonessential, paltry, petty, piddling*, puny, slight, small, superficial, trifling, trite, unimportant, inconsiderable, of no account

* = informal/non-formal usage

Main Entry:	scatterbrained
Part of Speech:	adjective
Definition:	not thinking clearly
Synonyms:	careless, dizzy, empty-headed, featherbrained, flighty, forgetful, frivolous, giddy, harebrained, illogical, inattentive, irrational, irresponsible, madcap, silly, slaphappy, stupid, thoughtless, birdbrained
Antonyms:	aware, careful, sensible, thoughtful

* = informal/non-formal usage

Main Entry:	silly
Part of Speech:	adjective
Definition:	absurd, giddy, foolish
Synonyms:	asinine, balmy, brainless, childish, crazy, dizzy, empty, empty-headed, fatuous, featherbrained, flighty, foolhardy, frivolous, harebrained, idiotic, ignorant, illogical, immature, imprudent, inane, inappropriate, inconsistent, irrational, irresponsible, ludicrous, meaningless, nonsensical, pointless, preposterous, puerile, ridiculous, senseless, simple, simpleminded, stupid, unintelligent, unreasonable, unwise, vacuous, witless, dippy, muddle-headed, nitwitted, sheepheaded
Antonyms:	mature, mundane, practical, sensible, serious, wise

* = informal/non-formal usage

Main Entry:	skittish
Part of Speech:	adjective
Definition:	very nervous
Synonyms:	capricious, changeable, combustible, dizzy, edgy, excitable, excited, fearful, fickle, fidgety, flighty, frivolous, giddy, harebrained, high-strung, irresponsible, jumpy, lightheaded, lively, peppy, playful, restive, scatterbrained, sensitive, spirited, undependable, unreliable, whimsical, zippy, agitable, alarmable, volative
Antonyms:	calm, collected, laid-back, easy-going, unworried

* = informal/non-formal usage

Main Entry:	superficial
Part of Speech:	adjective
Definition:	without depth, detail
Synonyms:	apparent, casual, cosmetic, cursory, desultory, empty, evident, exterior, external, flash, flimsy, frivolous, general, glib, half-baked, hasty, hurried, ignorant, inattentive, lightweight, ostensible, outward, partial, passing, perfunctory, peripheral, seeming, shallow, shoal, silly, sketchy, skin-deep, slapdash*, slight, summary, surface, trivial, uncritical, depthless, nodding, on the surface, one-dimensional, quick-fix, smattery, tip of the iceberg, warped
Antonyms:	analytical, careful, deep, detailed, genuine, thorough

* = informal/non-formal usage

Main Entry:	trifling
Part of Speech:	adjective
Definition:	insignificant, worthless
Synonyms:	banal, dinky, empty, frivolous, hollow, idle, idling, inane, inconsequential, insipid, jejune, measly, minuscule, negligible, niggling, nugatory, paltry, petty, picayune, piddling, puny, shallow, silly, slight, small, tiny, trivial, unimportant, vain, valueless, vapid, forget it, inconsiderable, loitering, no big deal, no big thing
Antonyms:	important, significant, useful, worthwhile