6
extempore(adverb, impulse, impromptu)
5
impromptu(adverb, impulse, offhand, impulsively, spontaneously)
4
ad lib(expression, idiom, adverb, impromptu, spontaneously)
4
extemporarily
4
offhand(adverb, impulse)
4
spontaneously(adverb, freely, impromptu, impulsively, improv)
3
off the cuff(expression, adjective, idiom, adverb, preparation)
2
abruptly(adverb, impulsively)
2
ad-lib(adverb, manner, offhand, impromptu, spontaneously)
2
impulsively(adverb, impulsively)
1
briefly
1
extemporely
1
haphazardly
1
hastily(adverb, impulsively)
1
impromptuly
1
improvisationally
1
instantaneously(adverb, impulsively)
1
offhandedly
1
offhandly
1
out of hand(expression, idiom)
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APASmart Define. (2015). extemporaneously thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/extemporaneously/thesaurus/synonyms
ChicagoSmart Define. 2015. "extemporaneously thesaurus" https://smartdefine.org/extemporaneously/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, extemporaneously thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/extemporaneously/thesaurus/synonyms>.
MLASmart Define. "extemporaneously thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/extemporaneously/thesaurus/synonyms>