Spontaneous synonyms and antonyms

spŏn-tā'nē-əs

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Part of speech:

unplanned
Not thought out or prepared in advance; spontaneous:
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natural
That exists and evolved within the confines of an ecosystem.
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impromptu
Spoken, performed, done, or composed with little or no preparation; extemporaneous:
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unconscious
The definition of unconscious is lacking awareness or done without realizing, or it is knocked-out, sleeping or comatose.
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casual
Not serious or thorough; superficial:
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instinctive
Of, relating to, or prompted by instinct:
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involuntary
Not subject to control of the volition:
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impulsive
Having the power of driving or impelling; giving an impulse; moving; impellent.
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automatic
Acting or operating in a manner essentially independent of external influence or control:
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careless
The definition of careless is not paying proper attention to detail or not taking care to do something well enough or correctly.
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free
Empty or unoccupied:
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automaticity
The condition of being automatic, or the degree of this
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induced (antonym)
happening or arising without apparent external cause
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ad-lib
Uttered, performed, or carried out spontaneously:
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volitional
Done intentionally, not by accident
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unbidden
Not invited, asked, or requested; unasked:
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unintentional
Not deliberate or intentional; inadvertent:
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deliberate (antonym)
Formed with deliberation; well-advised; carefully considered; not sudden or rash.
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willful (antonym)
Done in a manner which was intended.
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intended (antonym)
Meant; planned
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makeshift
Suitable as a temporary or expedient substitute:
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inevitable
The definition of inevitable is something that is certain to happen.
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unavoidable
That cannot be avoided; inevitable
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unwilling
Not willing or inclined; reluctant; loath; averse
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uncontrollable
Not able to be controlled, contained or governed.
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gratuitous
Given freely; unearned.
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idiopathic
(Pathology) Of, relating to, or designating a disease or condition having no known cause.
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indigenous
(Chiefly of living things) Born or engendered in, native to a land or region, especially before an intrusion. [from 17th c.]
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knee-jerk
Easily predictable; automatic:
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native
As found in nature; natural and not refined, adorned, or altered by man
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off-the-cuff
Not prepared in advance; impromptu:
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offhand
Performed or expressed without preparation or forethought:
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reflex
(Photography) Of a camera or camera mechanism, using a mirror to reflect the image onto a ground-glass viewfinder, allowing the photographer to see it up to the moment of exposure.
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unforced
Not forced; caused by oneself.
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unthinking
Showing no regard; careless or unconcerned.
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voluntary
Done or undertaken of one's own free will:
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automatism
Free expression of the unconscious mind by releasing it from the control of the conscious
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impulsivity
Inclination to act on impulse rather than thought.
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spontaneity
(Biology) The tendency to undergo change, characteristic of both animal and vegetable organisms, and not restrained or checked by the environment.
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forced (antonym)
Obtained forcefully, not naturally
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planned (antonym)
Existing or designed according to a plan
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unpremeditated
Not planned or thought out in advance:
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easy
Free from worry, anxiety, trouble, or pain:
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easygoing
The definition of easygoing is someone or something that is relaxed, tolerant and not prone to rigid rules or bouts of temper.
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informal
Suited for everyday use.
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relaxed
Free from strain or tension.
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laid-back
Having a relaxed or casual atmosphere or character; easygoing:
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willing (related)
Acting, giving, etc. readily and cheerfully
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plain (related)
Not dyed, twilled, or patterned:
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tighten (related)
Unconstrained by rigid standards or ceremony
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unwritten
Implicit or understood but not formally articulated.
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self-generated
happening or arising without apparent external cause
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visceral (related)
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non-spontaneous (related)
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transient (related)
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uninhibited (related)
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cathartic (related)
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sudden (related)
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irresistible
Too strong, fascinating, compelling, etc. to be resisted or withstood
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resistless
That cannot be resisted; irresistible
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intuitive
Easily understood and simple to use:
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unforce
Done by one's own choice
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unprepared
Not equipped to meet a contingency.
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calculated (antonym)
Produced by calculation
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Synonym Study

  • Automatic suggests an unvarying, machinelike reaction to a given stimulus or situation an automatic response
  • Involuntary refers to that which is done without thought or volition, as a reflex action an involuntary scowl, an involuntary flicker of the eyelid
  • Instinctive suggests an immediate, unwilled response to a stimulus, as if prompted by some natural, inborn tendency he took an instinctive liking to her
  • Impulsive applies to that which is prompted by some external incitement or sudden inner inclination rather than by conscious rational volition an impulsive retort
  • Spontaneous applies to that which is done so naturally that it seems to come without prompting or premeditation a spontaneous demonstration
Find another word for spontaneous. In this page you can discover 73 synonyms, antonyms, idiomatic expressions, and related words for spontaneous, like: unplanned, natural, impromptu, unconscious, casual, instinctive, involuntary, impulsive, automatic, careless and free.
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Spontaneous Sentence Examples

  • Sometimes spontaneous events worked out better than well-planned ones.

  • Helen is a wonderful child, so spontaneous and eager to learn.

  • Almost all day long the house resounded with their running feet, their cries, and their spontaneous laughter.

  • And Nicholas heard her spontaneous, happy, ringing laughter.

  • Others are deprived of a part of their more volatile constituents by spontaneous evaporation, or by distillation, in vacuo or otherwise, at the lowest possible temperature.

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Words near spontaneous in the Thesaurus