66 entries under spontaneous topic. ×

1
up front(expression, adjective, simple, natural, casual)
1
willing(adjective, simple, natural, casual, impulsive)
0
Band-Aid(unplanned, unpremeditated)
0
fly-by-night(unplanned, unpremeditated)
0
hit-or-miss(unplanned, unpremeditated)
0
off your own bat(expression, idiom, willing, unforced)
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APASmart Define. (2015). extemporaneous thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/extemporaneous/thesaurus/synonyms
ChicagoSmart Define. 2015. "extemporaneous thesaurus" https://smartdefine.org/extemporaneous/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, extemporaneous thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/extemporaneous/thesaurus/synonyms>.
MLASmart Define. "extemporaneous thesaurus" 13 April 2015. Web. 1 October 2026. <https://smartdefine.org/extemporaneous/thesaurus/synonyms>