Synonyms|241Antonyms|112|Broader|3Narrower|0Related|712
1
unmanufactured
1
unmeditated(thoughtless, impulse, impetuous, unwary)
1
unpremediated(adjective, simple, natural, casual, impulsive)
1
unprimed
1
unready
1
unsophisticated(adjective, simple, poor, natural, casual)
1
unthought(unplanned, accidental, inadvertent)
1
up-and-down(thoughtless, impetuous, unwary)
1
up front(expression, adjective, simple, natural, casual)
1
vamped(fake, unprepared, unplanned, unrehearsed, unscripted)
1
whipped up(expression, fake, unprepared, unplanned, unrehearsed)
1
willing(adjective, simple, natural, casual, impulsive)
1
winged(fake, unprepared, unplanned, unrehearsed, unscripted)
1
winging it(expression, adjective, free, casual, thoughtless)
1
without restraint(expression, adverb, informal, impulsive, extemporize)
0
Band-Aid(spontaneous, unplanned, unpremeditated)
0
accident
0
ad libitem(expression, idiom, nonpreparation)
0
adventitious(chance, unplanned, unpremeditated)
0
apprehension
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ChicagoSmart Define. 2015. "extemporaneous thesaurus" https://smartdefine.org/extemporaneous/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, extemporaneous thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/extemporaneous/thesaurus/synonyms>.
MLASmart Define. "extemporaneous thesaurus" 13 April 2015. Web. 29 September 2026. <https://smartdefine.org/extemporaneous/thesaurus/synonyms>