Synonyms of capricious

capricious

adjective

kə-ˈpri-shəs 

1

as in volatile

likely to change frequently, suddenly, or unexpectedly

capricious weather that was balmy one day and freezing cold the next

Synonyms & Similar Words

• volatile
• unpredictable
• changeful
• inconsistent
• unstable
• uncertain
• variable
• mercurial
• fickle
• inconstant
• temperamental
• changeable
• unsettled
• mutable
• fluctuating
• erratic
• arbitrary
• random
• unsteady
• up in the air
• haphazard
• unreliable
• fluid
• skittish
• aimless
• flickery
• scattered
• shaky
• stray
• ambivalent
• slapdash
• untrustworthy
• desultory
• undependable
• hit-or-miss
• irregular
• dicey
• protean
• versatile
• vacillating
• adaptable
• wavering
• shilly-shallying
• mobile
• shilly-shally
• hesitating

Antonyms & Near Antonyms

• certain
• constant
• predictable
• invariable
• steady
• stable
• immutable
• unchangeable
• unchanging
• stationary
• uniform
• settled
• unvarying
• permanent
• persistent
• even
• changeless
• durable
• abiding
• equable
• lasting
• reliable
• true
• sure
• dependable
• trustworthy
• trusty
• tried
• tried-and-true

2

as in impulsive

prone to sudden illogical changes of mind, ideas, or actions

a capricious woman who changed her mind dozens of times about what color to paint the bathroom

Synonyms & Similar Words

• impulsive
• volatile
• eccentric
• whimsical
• moody
• freakish
• romantic
• willful
• impetuous
• mercurial
• arbitrary
• temperamental
• shaky
• quirky
• flaky
• fickle
• erratic
• inconstant
• impractical
• quixotic
• unrealistic
• crankish
• irregular
• utopian
• visionary
• quixotical

Antonyms & Near Antonyms

• reasonable
• practical
• equable
• pragmatic
• sensible
• matter-of-fact
• rational
• logical
• earthy
• hardheaded
• sound
• down-to-earth
• grounded
• sane
• inflexible
• invariable
• unrelenting
• uncompromising
• unalterable
• immutable
• unchangeable
• unyielding
• commonsensical
• sober
• constant
• fixed
• unbending
• tough-minded
• levelheaded
• fast
• hard-and-fast
• stable
• steady
• unchanging
• steadfast
• unvarying
• hard-boiled
• changeless
• established
• no-nonsense
• sobersided
• settled
• set

Synonym Chooser

How does the adjective capricious differ from other similar words?

Some common synonyms of capricious are fickle, inconstant, mercurial, and unstable. While all these words mean "lacking firmness or steadiness (as in purpose or devotion)," capricious suggests motivation by sudden whim or fancy and stresses unpredictability.

an utterly capricious critic

When can fickle be used instead of capricious?

In some situations, the words fickle and capricious are roughly equivalent. However, fickle suggests unreliability because of perverse changeability and incapacity for steadfastness.

performers discover how fickle fans can be

Where would inconstant be a reasonable alternative to capricious?

Although the words inconstant and capricious have much in common, inconstant implies an incapacity for steadiness and an inherent tendency to change.

an inconstant friend

When could mercurial be used to replace capricious?

The meanings of mercurial and capricious largely overlap; however, mercurial implies a rapid changeability in mood.

made anxious by her boss's mercurial temperament

When might unstable be a better fit than capricious?

While the synonyms unstable and capricious are close in meaning, unstable implies an incapacity for remaining in a fixed position or steady course and applies especially to a lack of emotional balance.

too unstable to hold a job

Example Sentences

Recent Examples of capricious

The lawsuit, brought last year by a coalition of medical groups and doctors, sought to block mass policy changes at HHS, arguing the agency's decisions were arbitrary and capricious. —Jacob Rosen, CBS News, 16 Mar. 2026

The data collection demand is arbitrary, capricious and contrary to law, the attorney general said. —Sharon Bernstein, Sacbee.com, 11 Mar. 2026

Ambitious, capricious, Catalina is accustomed to getting her way, until her life in Spain implodes forcing her to flee to Cuba, to confront her mistakes, guilt and need to rebuild her entire life. —John Hopewell, Variety, 9 Mar. 2026

Winning is difficult, especially in a sport as capricious as hockey. —Steve Conroy, Boston Herald, 26 Feb. 2026

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