Synonyms|363Antonyms|90|Broader|9Narrower|7Related|1k
2
natural(adjective, simple, casual, impulsive, willing)
2
off hand(expression, idiom)
2
off the hip(expression, idiom, adverb, offhand, extemporaneous)
2
precipitate
2
quick
2
random(chance, unplanned, accidental, unintended, unpremeditated)
2
rash(adjective, impulsive)
2
reflexive(adjective, impulsive)
2
scratch
2
spur
2
surprised(unqualified, unsuspecting, unready)
2
unorganized
2
unready(unqualified, unsuspecting)
2
unscripted(adjective, adverb, mock, affected, spontaneous)
2
winged(adjective, adverb, informal, unqualified, unprepared)
1
according to pleasure(expression, idiom, adverb, informal, extemporize)
1
ad-libbing
1
aimless
1
arrangement
1
as one wishes(expression, idiom, adverb, informal, extemporize)
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ChicagoSmart Define. 2016. "impromptu thesaurus" https://smartdefine.org/impromptu/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, impromptu thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/impromptu/thesaurus/synonyms>.
MLASmart Define. "impromptu thesaurus" 28 January 2016. Web. 20 September 2026. <https://smartdefine.org/impromptu/thesaurus/synonyms>