7 entries under offhand topic. ×

5
impromptu(adverb, impulse, impulsively, spontaneously)
2
ad-lib(adverb, manner, impromptu, spontaneously)
1
without preparation(expression, idiom, adverb, freely)
0
by ear(expression, impromptu, spontaneously, improv)
0
improv(impromptu, spontaneously)
0
off the hip(expression, idiom, impromptu, spontaneously)
0
spur of the moment(expression, idiom, impromptu, spontaneously)
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APASmart Define. (2015). extemporaneously thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/extemporaneously/thesaurus/synonyms
ChicagoSmart Define. 2015. "extemporaneously thesaurus" https://smartdefine.org/extemporaneously/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, extemporaneously thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/extemporaneously/thesaurus/synonyms>.
MLASmart Define. "extemporaneously thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/extemporaneously/thesaurus/synonyms>