23 entries under spontaneous topic. ×

7
unplanned(adjective, insignificant, irregular, senseless, planned)
3
unpremeditated(adjective, careless, chance, casual)
2
unarranged(unplanned, unpremeditated)
1
Band-Aid(crude, substitute, temporary, unplanned)
1
makeshift(adjective, crude, temporary, unplanned)
1
offhand(careless, casual, arbitrary, unplanned)
0
ad-lib(unplanned, unpremeditated)
0
ad hoc(expression, unplanned, unpremeditated)
0
ad lib(expression, unplanned, unpremeditated, autoschediastic)
0
autoschediastic(unplanned, unpremeditated)
0
extemporaneous(unplanned, unpremeditated)
0
extempore(unplanned, unpremeditated)
0
extemporized(unplanned, unpremeditated)
0
fly-by-night(unplanned, unpremeditated, Band-Aid, autoschediastic)
0
impromptu(unplanned, unpremeditated)
0
improvised(crude, unplanned, unpremeditated, rough-and-ready)
0
improviso(unplanned, unpremeditated, autoschediastic)
0
made-up(unplanned, unpremeditated)
0
off-the-cuff(unplanned, unpremeditated)
0
spur-of-the-moment(unplanned, unpremeditated)
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APASmart Define. (2015). hit-or-miss thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/hit-or-miss/thesaurus/synonyms
ChicagoSmart Define. 2015. "hit-or-miss thesaurus" https://smartdefine.org/hit-or-miss/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, hit-or-miss thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/hit-or-miss/thesaurus/synonyms>.
MLASmart Define. "hit-or-miss thesaurus" 13 April 2015. Web. 30 September 2026. <https://smartdefine.org/hit-or-miss/thesaurus/synonyms>