31 entries under informal topic. ×

2
by ear(expression, adjective, free, fake)
2
improv(adjective, free, fake, casual)
2
improviso(adjective, free, fake, casual)
2
on-the-spot(adjective, free, fake, casual)
2
on impulse(expression, adjective, free, fake)
2
spontaneous(adjective, free, casual, impulse)
1
ad lib(expression, adjective, free, casual)
1
at first glance(expression, idiom, free, casual)
1
automatic(adjective, free, casual, impulsive)
1
casual(adjective, free, impulsive, unprepared)
1
expedient(adjective, free, casual, snap)
1
free(adjective, casual, impulsive, unprepared)
1
immediate(adjective, free, casual, snap)
1
jamming(adjective, free, casual, snap)
1
made-up(adjective, free, casual, snap)
1
makeshift(adjective, free, casual, snap)
1
off the cuff(adjective, free, casual, snap)
1
off the top of head(expression, idiom, free, casual)
1
offhand(adjective, free, casual, impulsive)
1
snap(adjective, free, casual, impulsive)
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APASmart Define. (2013). improvisatory thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/improvisatory/thesaurus/synonyms
ChicagoSmart Define. 2013. "improvisatory thesaurus" https://smartdefine.org/improvisatory/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2013, improvisatory thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/improvisatory/thesaurus/synonyms>.
MLASmart Define. "improvisatory thesaurus" 19 May 2013. Web. 23 September 2026. <https://smartdefine.org/improvisatory/thesaurus/synonyms>