54 entries under spontaneous topic. ×

1
extemporary(adjective, free, fake, casual, impulsive)
1
fake(verb, adjective, free, casual, devise)
1
familiar(adjective, simple, easy, plain, straightforward)
1
folksy(adjective, simple, easy, plain, modest)
1
frank(adjective, simple, plain, relaxed, straightforward)
1
free-and-easy(adjective, simple, plain, relaxed, straightforward)
1
homey(adjective, simple, easy, plain, modest)
1
improvised(adjective, adverb, free, casual)
1
inconspicuous(adjective, simple, plain, relaxed, straightforward)
1
intimate(adjective, simple, easy, plain, relaxed)
1
laid back(expression, adjective, simple, relaxed, straightforward)
1
loose(adjective, simple, easy, plain, modest)
1
mixed(adjective, simple, plain, relaxed, straightforward)
1
motley(adjective, simple, plain, relaxed, straightforward)
1
natural(adjective, simple, easy, plain, straightforward)
1
open(adjective, simple, plain, relaxed, straightforward)
1
ordinary(adjective, simple, plain, relaxed, straightforward)
1
simple(adjective, easy, plain, modest, straightforward)
1
sporty(adjective, simple, plain, relaxed, straightforward)
1
straightforward(adjective, simple, easy, plain, relaxed)
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APASmart Define. (2013). improv thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/improv/thesaurus/synonyms
ChicagoSmart Define. 2013. "improv thesaurus" https://smartdefine.org/improv/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2013, improv thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/improv/thesaurus/synonyms>.
MLASmart Define. "improv thesaurus" 17 June 2013. Web. 27 September 2026. <https://smartdefine.org/improv/thesaurus/synonyms>