| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | given to sudden behavior change |
| Synonyms: | any way the wind blows, arbitrary, blowing hot and cold, careless, changeful, contrary, crotchety, effervescent, erratic, every which way, fanciful, fickle, fitful, flaky*, flighty, freakish, gaga, helter-skelter, humorsome, impulsive, inconstant, kinky*, lubricious, mercurial, moody, mutable, notional, odd, picky*, punchy, queer, quirky, temperamental, ticklish, unpredictable, unreasonable, unstable, up and down, vagarious, variable, volatile, wayward, whimsical, yo-yo |
| Antonyms: | constant, dependable, sensible, staid, steadfast, steady |
| Main Entry: | arbitrary |
| Part of Speech: | adjective |
| Definition: | whimsical, chance |
| Synonyms: | approximate, capricious, discretionary, erratic, fanciful, frivolous, inconsistent, injudicious, irrational, irresponsible, offhand, optional, random, subjective, supercilious, superficial, unaccountable, unreasonable, unscientific, wayward, willful |
| Antonyms: | circumspect, rational, reasonable, reasoned, supported |
| Main Entry: | chancy |
| Part of Speech: | adjective |
| Definition: | dangerous, risky |
| Synonyms: | capricious, contingent, dicey, erratic, fluctuant, fluky, hazardous, iffy, incalculable, precarious, problematic, problematical, rocky, speculative, ticklish, touchy, tricky, uncertain, unpredictable, unsound, whimsical |
| Antonyms: | certain, not dangerous, safe, secure, sure, tried |
| Main Entry: | changeable |
| Part of Speech: | adjective |
| Definition: | erratic |
| Synonyms: | agitated, capricious, changeful, commutative, convertible, fickle, fitful, flighty, fluctuating, fluid, impulsive, inconstant, indecisive, irregular, irresolute, irresponsible, kaleidoscopic, mercurial, mobile, movable, mutable, permutable, protean, restless, reversible, revocable, shifting, skittish, spasmodic, transformable, transitional, uncertain, unpredictable, unreliable, unsettled, unstable, unsteady, vacillating, vagrant, variable, variant, varying, versatile, volatile, wavering, whimsical |
| Antonyms: | certain, changeless, constant, fixed, lasting, reliable, stable, steady, sure, unchangeable, undeviating |
| Main Entry: | dicey |
| Part of Speech: | adjective |
| Definition: | risky |
| Synonyms: | capricious, chancy, dangerous, difficult, erratic, fluctuant, iffy, incalculable, ticklish, tricky, uncertain, unpredictable, whimsical |
| Antonyms: | certain, safe, sure |
| Main Entry: | dizzy |
| Part of Speech: | adjective |
| Definition: | flighty, scatterbrained |
| Synonyms: | capricious, changeable, crazy, empty-headed, fatuous, feather-brained, fickle, foolish, frivolous, giddy, harebrained, heady, inane, light-headed, silly, skittish, unstable |
| Antonyms: | clear-thinking, sensible, smart |
| Main Entry: | eccentric |
| Part of Speech: | adjective |
| Definition: | bizarre, unusual |
| Synonyms: | aberrant, abnormal, anomalous, beat*, bent*, bizarre, capricious, characteristic, cockeyed, crazy, curious, droll, erratic, far out, flaky, freak, freakish, funky*, funny, idiosyncratic, irregular, kooky, nutty, odd, oddball, off the wall, off-center, offbeat, out in left field, outlandish, peculiar, quaint, queer, quirky, quizzical, singular, strange, uncommon, unconventional, unnatural, way out, weird, whimsical, wild |
| Antonyms: | boring, common, dull, normal, ordinary, plain, regular, standard, unexciting, usual |
| Main Entry: | erratic |
| Part of Speech: | adjective |
| Definition: | unpredictable; wandering |
| Synonyms: | aberrant, abnormal, anomalous, arbitrary, bizarre, capricious, changeable, desultory, devious, dicey, directionless, dubious, eccentric, fitful, flaky*, fluctuant, idiosyncratic, iffy, incalculable, inconsistent, inconstant, irregular, meandering, mercurial, nomadic, oddball, peculiar, planetary, rambling, roving, shifting, spasmodic, strange, stray, uncertain, undirected, unnatural, unreliable, unstable, unusual, vagarious, variable, volatile, wayward, weird, whimsical |
| Antonyms: | certain, consistent, definite, dependable, predictable, regular, reliable, steady, sure, unchanging |
| Main Entry: | faithless |
| Part of Speech: | adjective |
| Definition: | disloyal |
| Synonyms: | capricious, changeable, changeful, cheating, deceitful, dishonest, double-crossing, double-dealing, doubting, dubious, false, fickle, fluctuating, inconstant, perfidious, recreant, skeptical, traitorous, treacherous, two-faced, two-timing, unbelieving, unconverted, unfaithful, unloyal, unreliable, unstable, untrue, untrustworthy, untruthful, wavering |
| Antonyms: | believing, constant, faithful, loyal, reliable, true |