Synonyms for Spontaneous:

• adj.

  •ad-lib (adjective)
  • made up,
  • as one wishes,
  • unrehearsed,
  • as one thinks best,
  • without restraint,
  • at will,
  • ADLIB.
  •automatic (adjective)
  • autogenetic,
  • knee-jerk,
  • Unmeditated,
  • habitual,
  • unwilled.
  •casual (adjective)
  • in-frequent,
  • un-expected,
  • most serendipitous,
  • un expected,
  • un-foreseen,
  • irregular,
  • un premeditated,
  • more serendipitous,
  • un-premeditated,
  • in frequent,
  • un foreseen.
  •chatty (adjective)
  • looselipped,
  • gossipy,
  • multi-eloquent,
  • multi eloquent,
  • most multieloquent,
  • friendly,
  • loose lipped,
  • most looselipped,
  • more loose-lipped,
  • most loose-lipped,
  • more multieloquent,
  • more loose lipped,
  • more familiar,
  • most loose lipped,
  • more looselipped.
  •childlike (adjective)
  • more trustful,
  • un-feigned,
  • un feigned,
  • ingenuous,
  • most trustful.
  •easy (adjective)
  • most unworried,
  • effortless,
  • most undemanding,
  • more unexacting,
  • more undemanding,
  • un troubled,
  • more cursive,
  • peaceful,
  • un-worried,
  • more unworried,
  • un worried,
  • un-exacting,
  • un-disturbed,
  • un exacting,
  • un-troubled,
  • un hurried,
  • most unexacting,
  • most cursive,
  • un disturbed,
  • un-hurried,
  • un demanding,
  • well to do,
  • un-demanding.
  •emotional (adjective)
  • heartwarming,
  • over-wrought,
  • excitable,
  • hotblooded,
  • temperamental,
  • hot-blooded,
  • hysterical.
  •extemporaneous/extemporary (adjective)
  • more improvisatory,
  • snappest,
  • more improviso,
  • off top head,
  • more improv,
  • most improv,
  • most improvisatory,
  • ex-temporary,
  • more on the spot,
  • most improviso,
  • most jamming,
  • most on the spot,
  • more on-the-spot,
  • off the top of head,
  • off the top head,
  • jamming,
  • ex temporary,
  • most on-the-spot,
  • more jamming.
  •free (adjective)
  • gratuitous.
  •friendly (adjective)
  • charming,
  • neighborly,
  • genial,
  • cordially,
  • genuine,
  • personal,
  • welcoming,
  • affable,
  • generous,
  • social,
  • amicable,
  • pleasant,
  • congenial,
  • likable,
  • approachable,
  • buddy-buddy,
  • accessible,
  • warmly,
  • neighbourly,
  • bluff,
  • harmonious,
  • convivial,
  • good-humored,
  • companionable,
  • well-disposed,
  • simpatico,
  • brotherly,
  • amiable,
  • matey,
  • nice,
  • outgoing,
  • warm,
  • cordial,
  • good-natured,
  • gregarious,
  • out-there,
  • pally,
  • Warm-hearted,
  • sociable,
  • attentive.
  •gratuitous (adjective)
  • for nothing,
  • gratis,
  • unaskedfor,
  • un-paid,
  • most costless,
  • more unasked for,
  • unasked for,
  • unpaid,
  • more chargeless,
  • more unaskedfor,
  • un paid,
  • most unasked-for,
  • most unaskedfor,
  • most chargeless,
  • more unasked-for,
  • most unasked for,
  • more costless.
  •gut (adjective)
  • deepseated,
  • more viscerous,
  • deep seated,
  • most viscerous.
  •haphazard (adjective)
  • dis-orderly,
  • un-coordinated,
  • dis orderly,
  • flukest,
  • more designless,
  • all over map,
  • more unmethodical,
  • de-signless,
  • most unmethodical,
  • in discriminate,
  • un-considered,
  • dis-organized,
  • in-discriminate,
  • dis organized,
  • helterskelter,
  • un concerned,
  • un methodical,
  • un considered,
  • un systematic,
  • willynilly,
  • devil may care,
  • most designless,
  • de signless,
  • helter skelter,
  • un organized,
  • un-concerned,
  • fluker,
  • un-methodical,
  • un-systematic,
  • un coordinated,
  • unsystematic,
  • un-organized.
  •impetuous (adjective)
  • going deep end,
  • Subitaneous,
  • un-reflecting,
  • un-bridled,
  • un reflecting,
  • headlong,
  • unreflecting,
  • un bridled,
  • head-long,
  • most unreflecting,
  • more unreflecting,
  • head long,
  • going off deep end,
  • most subitaneous,
  • more subitaneous.
  •impromptu (adjective)
  • more faked,
  • more unscripted,
  • most vamped,
  • more vamped,
  • most unscripted,
  • un-scripted,
  • most faked,
  • shot from hip.
  •improvised (adjective)
  • more autoschediastic,
  • fly by night,
  • most autoschediastic,
  • bandaid,
  • most band-aid,
  • more band-aid,
  • more bandaid,
  • more band aid,
  • most band aid,
  • most bandaid.
  •impulsive (adjective)
  • ill-considered,
  • gone off deep end,
  • instantaneous,
  • rash,
  • hot and cold,
  • abrupt,
  • unprompted,
  • improvised,
  • hot-and-cold,
  • hasty,
  • unpremeditated.
  •impulsive, willing (adjective)
  • irresistible,
  • Unartful,
  • up front,
  • unavoidable,
  • offhand,
  • inevitable,
  • extempore,
  • unpremediated,
  • break loose,
  • unsophisticated,
  • simple,
  • unconstrained,
  • free spirited,
  • voluntary,
  • down,
  • from the hip,
  • unbidden,
  • uncontrolled.
  •informal (adjective)
  • more free and easy,
  • unfussier,
  • more low-pressure,
  • unfussiest,
  • most throwaway,
  • more low pressure,
  • folksy,
  • more free-and-easy,
  • most free-and-easy,
  • down home,
  • in formal,
  • most lowpressure,
  • un official,
  • in-formal,
  • most low pressure,
  • un fussier,
  • more throwaway,
  • most low-pressure,
  • lowpressure,
  • most free and easy,
  • un-conventional,
  • un-fussier,
  • un-fussiest,
  • un-ceremonious,
  • un conventional,
  • un-fussy,
  • un fussiest,
  • un fussy,
  • un-official,
  • un constrained,
  • in-conspicuous,
  • in conspicuous,
  • un ceremonious,
  • more lowpressure.
  •instantaneous (adjective)
  • in flash,
  • more hair trigger,
  • more hairtrigger,
  • most hairtrigger,
  • most hair-trigger,
  • more hair-trigger,
  • hair-trigger,
  • most hair trigger,
  • hair trigger.
  •instinctive (adjective)
  • un-learned,
  • more second nature,
  • re-gular,
  • by seat of one pants,
  • by seat pants,
  • by seat one's pants,
  • by seat one pants,
  • in tuitional,
  • in-grained,
  • un learned,
  • most second-nature,
  • more secondnature,
  • in-tuitional,
  • more second-nature,
  • most intuitional,
  • more intuitional,
  • in-born,
  • secondnature,
  • re gular,
  • in born,
  • most second nature,
  • by seat of pants,
  • by seat of ones pants,
  • most secondnature,
  • by seat ones pants.
  •intuitive (adjective)
  • under stood,
  • gut,
  • under-stood.
  •involuntary (adjective)
  • more begrudging,
  • more will less,
  • in-voluntary,
  • willless,
  • more reflexive,
  • in voluntary,
  • un willing,
  • more willless,
  • un-witting,
  • most will less,
  • most uncalculated,
  • more will-less,
  • un calculated,
  • un intended,
  • more grudging,
  • un-intended,
  • be grudging,
  • most will-less,
  • un witting,
  • un-controlled,
  • most reflexive,
  • un-calculated,
  • most willless,
  • will less,
  • un-willing,
  • most grudging,
  • be-grudging,
  • un controlled,
  • more uncalculated,
  • most begrudging.
  •knee-jerk (adjective)
  • predictable,
  • kneejerk.
  •naive (adjective)
  • like babe in the woods,
  • patsier,
  • un worldlier,
  • like a babe the woods,
  • like babe in woods,
  • more wideeyed,
  • un-worldlier,
  • in-nocuous,
  • like babe the woods,
  • in nocuous,
  • most sucker,
  • wide eyed,
  • most wide eyed,
  • more unsuspicious,
  • un-schooled,
  • most unjaded,
  • in nocent,
  • un-pretentious,
  • lambest,
  • un-jaded,
  • un sophisticated,
  • un suspecting,
  • simple minded,
  • un-suspicious,
  • patsiest,
  • un worldliest,
  • like a babe in woods,
  • most wide-eyed,
  • most confiding,
  • more sucker,
  • more wide eyed,
  • un worldly,
  • most wideeyed,
  • most unsuspicious,
  • lamber,
  • un schooled,
  • un-worldly,
  • more confiding,
  • un suspicious,
  • wideeyed,
  • un-suspecting,
  • like a babe woods,
  • more unjaded,
  • like babe woods,
  • un-worldliest,
  • un jaded,
  • in-nocent,
  • more wide-eyed,
  • unjaded.
  •natural (adjective)
  • more simplehearted,
  • most ingenerate,
  • most natal,
  • more ingenerate,
  • un labored,
  • un assumed,
  • uni form,
  • most matter-of-course,
  • most uncontrived,
  • un-acquired,
  • most upfront,
  • more inartificial,
  • most up-front,
  • more unlabored,
  • un-assumed,
  • more natal,
  • un contrived,
  • un-labored,
  • more upfront,
  • more uncontrived,
  • more unassumed,
  • more up front,
  • in artificial,
  • more unembarrassed,
  • most unlabored,
  • Undesigning,
  • laidback,
  • most up front,
  • un-designing,
  • most unacquired,
  • pre vailing,
  • un designing,
  • more matter-of-course,
  • uni-form,
  • more unacquired,
  • uni-versal,
  • most matter of course,
  • more up-front,
  • un embarrassed,
  • in-artificial,
  • matter-of-course,
  • most undesigning,
  • in generate,
  • un polished,
  • uni versal,
  • most unassumed,
  • more undesigning,
  • more matter of course,
  • in-generate,
  • un acquired,
  • un-embarrassed,
  • most inartificial,
  • most simplehearted,
  • un-contrived,
  • most unembarrassed.
  •offhand (adjective)
  • off the hip,
  • without preparation.
  •off the cuff (adjective)
  • off-hand.
  •reflex (adjective)
  • re flexer,
  • re flex,
  • re-flex,
  • re-flexest,
  • re flexest,
  • re-flexer.
  •relaxed (adjective)
  • hang-loose,
  • hang loose,
  • outgiving.
  •spur-of-the-moment (adjective)
  • spur of the moment.
  •thoughtless (adjective)
  • unguarded.
  •unaffected (adjective)
  • most unartificial,
  • more unspoilt,
  • un assuming,
  • more unartificial,
  • un-affected,
  • un affected,
  • un artificial,
  • most unspoilt,
  • un spoilt,
  • un-spoilt.
  •unasked (adjective)
  • unwelcome,
  • of one's own accord,
  • Undemanded,
  • of own accord,
  • not asked,
  • without prompting,
  • supererogatory,
  • of one accord,
  • unrequested.
  •uncompelled (adjective)
  • un compelled,
  • un-compelled.
  •unforced (adjective)
  • un forced,
  • un-forced.
  •unguarded (adjective)
  • unreflective,
  • Uncircumspect,
  • unwatchful,
  • unalert,
  • unvigilant.
  •uninhibited (adjective)
  • uncurbed,
  • unsuppressed,
  • unrepressed,
  • unself-conscious,
  • unhampered,
  • unselfconscious.
  •unplanned (adjective)
  • aleatory.
  •unprepared (adjective)
  • taken off guard,
  • napping,
  • caught off guard,
  • not prepared,
  • unready,
  • off the top of one's head.
  •unrestrained (adjective)
  • in continent,
  • dis solute,
  • un-restrained,
  • un-limited,
  • un-bounded,
  • incontinent,
  • dis-solute,
  • un restrained,
  • in-ordinate,
  • un bounded,
  • more saturnalian,
  • in-continent,
  • in temperate,
  • most saturnalian,
  • in-temperate.
  •unsolicited (adjective)
  • Volunteered,
  • freewilled.
  •unstudied (adjective)
  • un studied,
  • un-studied.
  •untaught (adjective)
  • untutored.
  •voluntary (adjective)
  • in tended,
  • in dependent,
  • free willed,
  • de liberate,
  • more witting,
  • un-prescribed,
  • un prescribed,
  • more free-willed,
  • more unprescribed,
  • de-liberate,
  • more free willed,
  • more volunteer,
  • more opted,
  • more willed,
  • most wished,
  • most free willed,
  • in-dependent,
  • most witting,
  • more discretional,
  • most free-willed,
  • most volunteer,
  • more wished,
  • most discretional,
  • most willed,
  • most opted,
  • most unprescribed,
  • in-tended,
  • more designful,
  • most designful.

• a. & adv.

  •impromptu (adjective, adverb)
  • un scripted.

• n.

  •
  • by accident.
  •
  • tighten.
  •involuntary (noun)
  • uncontrollable,
  • resistless,
  • unwilling.
  •self-generated (noun)
  • self-generated.
  •spontaneous (noun)
  • unwritten,
  • unplanted,
  • wild.

• Other synonyms:

  •
  • coincidental,
  • accidental,
  • random,
  • Willy nilly,
  • inadvertently,
  • unorganized,
  • laid-back,
  • sine die,
  • motiveless,
  • aimless,
  • spur-of-the-moment,
  • spontaneity,
  • unscheduled,
  • arbitrary,
  • unintentional,
  • automatically,
  • ad hoc,
  • seat-of-the-pants,
  • unwitting,
  • unwittingly,
  • incidentally,
  • unconscious,
  • unintended,
  • incidental.
  •
  • easygoing,
  • unceremonious,
  • primitive,
  • accidentally,
  • loose.
  •
  • cold.
  •
  • free.
  •ad-lib
  • ad lib.
  •intimate
  • chatty.
  •natural
  • untaught.
  •prompt
  • ready.

Paraphrases for Spontaneous:

• Equivalence

  • Adjective
    unprompted.

• Independent

  • Adjective
    automatic, self-activating, top-of-mind, autonomous, unplanned, indiscriminate, informal, endogenous, pop-up, sudden, random.
  • Noun, singular or mass
    combustion.

• Other Related

  • Adjective
    off-the-cuff, unsolicited, natural.
  • Proper noun, singular
    unsolicited.

Antonyms for Spontaneous:

• adj.

  • impulsive, willing
    intended, planned, deliberate, premeditated.
  • Other antonyms:
    designed, aforethought, Rehearsed, written, projected, meticulous, cultivated, careful, foresighted, predetermined, volitional, scripted, thoughtful, prepared, nonmechanical, refined, forethoughtful.

Homophones for Spontaneous:

• spending.