Synonyms for Impromptu:

• adj.

  •ad-lib (adjective)
  • at will,
  • as one thinks best,
  • without restraint,
  • ADLIB,
  • made up,
  • as one wishes.
  •ad hoc (adjective)
  • provisional.
  •casual (adjective)
  • un expected,
  • un foreseen,
  • un intentional,
  • in-frequent,
  • in frequent,
  • un-intentional,
  • un-expected,
  • irregular,
  • most serendipitous,
  • un-foreseen,
  • more serendipitous.
  •extemporaneous/extemporary (adjective)
  • most improvisatory,
  • most improv,
  • off the top of head,
  • more on-the-spot,
  • more jamming,
  • most on the spot,
  • un studied,
  • ex-temporary,
  • most jamming,
  • more improv,
  • more improviso,
  • in-formal,
  • most improviso,
  • un-studied,
  • jamming,
  • snappest,
  • ex temporary,
  • most on-the-spot,
  • more improvisatory,
  • more on the spot,
  • in formal.
  •improvised (adjective)
  • more bandaid,
  • most autoschediastic,
  • bandaid,
  • more band aid,
  • most band aid,
  • fly by night,
  • more band-aid,
  • more autoschediastic,
  • most bandaid,
  • most band-aid.
  •impulsive (adjective)
  • hasty,
  • unrehearsed,
  • instantaneous,
  • abrupt,
  • ill-considered,
  • rash,
  • improvised,
  • impulsive,
  • reflexive.
  •offhand (adjective)
  • throwaway.
  •spontaneous (adjective)
  • un-compelled,
  • un-prompted,
  • un bidden,
  • un forced,
  • from hip,
  • un sophisticated,
  • un-contrived,
  • more unbidden,
  • un artful,
  • more unpremediated,
  • un prompted,
  • un-controlled,
  • un conscious,
  • un-bidden,
  • more unprompted,
  • most uncontrived,
  • un-conscious,
  • un constrained,
  • most unbidden,
  • un controlled,
  • un-avoidable,
  • most unpremediated,
  • un-forced,
  • most unartful,
  • un-artful,
  • un contrived,
  • un avoidable,
  • in-voluntary,
  • in evitable,
  • more unartful,
  • in voluntary,
  • un compelled,
  • most unprompted,
  • in-evitable,
  • more uncontrived.
  •spur-of-the-moment (adjective)
  • spur of the moment.
  •stopgap (adjective)
  • rough and tumble,
  • temp.
  •sudden (adjective)
  • Subito,
  • flasher.
  •unplanned (adjective)
  • aleatory.
  •unpremeditated (adjective)
  • un-premeditated,
  • un premeditated.
  •unprepared (adjective)
  • makeshift,
  • napping,
  • undevised,
  • haphazard,
  • taken off guard,
  • caught off guard,
  • not prepared,
  • rough-and-ready.
  •unrehearsed (adjective)
  • un-rehearsed,
  • spur the moment,
  • spur of moment,
  • spur moment,
  • un practiced,
  • un rehearsed.

• adv

  •ad-lib (adverb)
  • without preparation,
  • off the top of one's head,
  • without rehearsal.

• adv.

  •ad libitum (adverb)
  • most spontaneously,
  • more spontaneously.
  •off the cuff (adverb)
  • off cuff,
  • more extemporaneously,
  • most extemporaneously.
  •spontaneously (adverb)
  • unconsciously,
  • un consciously,
  • un-consciously.

• n.

  •
  • by accident.
  •
  • snap,
  • prepared.
  •communication (noun)
  • impromptu.
  •impromptu (noun)
  • spur-of-the-moment,
  • spontaneously.
  •off the cuff (noun)
  • cuff.

• Other synonyms:

  •
  • automatic,
  • coincidental,
  • random,
  • instinctual,
  • unwittingly,
  • instinctive,
  • seat-of-the-pants,
  • motiveless,
  • inadvertently,
  • spontaneity,
  • Willy nilly,
  • unscheduled,
  • incidental,
  • unorganized,
  • unintended,
  • reflex,
  • unconscious,
  • accidental,
  • unintentional,
  • chance,
  • incidentally,
  • involuntary,
  • sine die,
  • aimless,
  • arbitrary,
  • unwitting.
  •
  • improvisation,
  • loose,
  • mechanical,
  • accidentally,
  • primitive.
  •
  • cold.
  •ad-lib
  • ad lib.
  •informal
  • candid.
  •Other relevant words:
  • discover,
  • instantaneously,
  • compensate,
  • flourish,
  • unready,
  • readiness,
  • riff,
  • surprised,
  • unprimed,
  • stand-by,
  • precipitate,
  • scratch,
  • invent,
  • Improvisatorial,
  • incautiously,
  • contrive,
  • curt,
  • imagine,
  • Unmanufactured,
  • thoughtlessly,
  • extemporisation,
  • hastily,
  • unmade,
  • Vamped,
  • cast,
  • flash,
  • develop,
  • originate,
  • naturally,
  • rashly,
  • last-minute,
  • ripeness,
  • settle,
  • taken by surprise,
  • Unconcocted,
  • caught off balance,
  • unwritten,
  • unexpected,
  • impetuously,
  • extemporize,
  • pro tempore,
  • mellowness,
  • extempore,
  • inspiration,
  • preparedness,
  • winged,
  • execute,
  • substitute,
  • cadenza,
  • Unpremeditatedly,
  • offhanded,
  • offhand,
  • uncalculated,
  • maturity,
  • stopgap,
  • freewill,
  • jury-rigged,
  • impulse,
  • extemporarily,
  • instantly,
  • rough,
  • musical composition,
  • impulsively,
  • arrangement,
  • feign,
  • devise,
  • unannounced,
  • spurt,
  • brashly,
  • careless,
  • unhatched,
  • uncontrolled,
  • unaffectedly,
  • make up,
  • jury-rig,
  • formulate,
  • unposed,
  • lick,
  • Extemporized,
  • Improvision,
  • shot from the hip,
  • unstudied,
  • caught napping,
  • Unarranged,
  • unexpectedly,
  • unconsidered,
  • construct,
  • voluntarily,
  • Unbegun,
  • comprise,
  • unthinkingly,
  • be,
  • interpolation,
  • playing by ear,
  • performance,
  • ad-libbing,
  • summarily,
  • hurried,
  • measure,
  • off the hip,
  • informally,
  • at short notice,
  • spur,
  • improvise,
  • quick,
  • tripped up,
  • unscripted,
  • natural,
  • played by ear,
  • caught short,
  • thrown off,
  • taken aback,
  • Undeliberated,
  • concoct,
  • nonchalant,
  • emergency,
  • faked,
  • dashed off,
  • fake,
  • vamp,
  • pick-up,
  • whipped up,
  • cavalier,
  • informal,
  • compose,
  • extemporaneousness,
  • temporary,
  • extemporaneously,
  • wing it,
  • brusque,
  • suddenly,
  • create,
  • out of hand,
  • at sight,
  • recklessly.

Paraphrases for Impromptu:

• Independent

  • Adjective
    ad-hoc, informal, unforeseeable.

• Other Related

  • Adjective
    improvised, off-the-cuff, makeshift, unpredictable.

Antonyms for Impromptu:

• adj.

  • unrehearsed, improvised
    deliberate.
  • Other antonyms:
    planned, premeditated, studied, elaborated, written, Rehearsed, premeditative, read.

Hyponym for Impromptu:

• n.

  • communication
    speech, address, passage, musical passage.