Synonyms|363Antonyms|90|Broader|9Narrower|7Related|1k

111 entries under adjective topic. ×

1
down(simple, natural, casual, impulsive)
1
extemporize(verb, informal, unplanned, off-the-cuff)
1
faked(adverb, mock, affected, unprepared)
1
free spirited(expression, simple, natural, casual)
1
impetuous(simple, natural, casual, quick)
1
inevitable(simple, natural, casual, impulsive)
1
instantaneous
1
irresistible(simple, natural, casual, impulsive)
1
off top of head(expression, idiom, adverb, simple)
1
played by ear(expression, idiom, adverb, unqualified)
1
shot from the hip(expression, idiom, adverb, mock)
1
simple(natural, casual, impulsive, willing)
1
thrown off(expression, adverb, mock, affected)
1
tossed off(expression, adverb, free, affected)
1
unannounced
1
unartful(simple, natural, casual, impulsive)
1
unavoidable(simple, natural, casual, impulsive)
1
unbidden(simple, natural, casual, impulsive)
1
uncompelled(simple, natural, casual, impulsive)
1
unconstrained(simple, natural, casual, impulsive)
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ChicagoSmart Define. 2016. "impromptu thesaurus" https://smartdefine.org/impromptu/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, impromptu thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/impromptu/thesaurus/synonyms>.
MLASmart Define. "impromptu thesaurus" 28 January 2016. Web. 24 September 2026. <https://smartdefine.org/impromptu/thesaurus/synonyms>