33 entries under informal topic. ×

1
spontaneous(free, casual, impulsive, snap)
1
spur-of-the-moment(adjective, free, casual, impulsive)
1
taking for ride(expression, free, casual, snap)
1
thought out loud(expression, free, casual, snap)
1
tossed off(expression, free, casual, snap)
1
tossed out(expression, free, casual, snap)
1
unplanned(free, casual, impulsive, unprepared)
1
unpremeditated(free, casual, impulsive, snap)
1
unprepared(free, casual, impulsive, snap)
1
unrehearsed(free, casual, impulsive, snap)
1
unstudied(free, casual, impulsive, unprepared)
1
winging it(expression, free, casual, unrehearsed)
0
off top of head(expression, idiom, snap, unrehearsed)
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APASmart Define. (2015). jamming thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/jamming/thesaurus/synonyms
ChicagoSmart Define. 2015. "jamming thesaurus" https://smartdefine.org/jamming/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, jamming thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/jamming/thesaurus/synonyms>.
MLASmart Define. "jamming thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/jamming/thesaurus/synonyms>