70 entries under simple topic. ×

1
natural(adjective, straightforward, casual, impulsive)
1
off top of head(expression, adjective, idiom, adverb)
1
open(adjective, easy, plain, straightforward)
1
ordinary(adjective, easy, plain, straightforward)
1
sporty(adjective, easy, plain, straightforward)
1
straightforward(adjective, easy, plain, modest)
1
throwaway(adjective, plain, straightforward, casual)
1
unartful(adjective, natural, casual, impulsive)
1
unavoidable(adjective, natural, casual, impulsive)
1
unbidden(adjective, natural, casual, impulsive)
1
unceremonious(adjective, easy, plain, straightforward)
1
uncompelled(adjective, natural, casual, impulsive)
1
unconscious(adjective, natural, casual, impulsive)
1
unconstrained(adjective, easy, plain, natural)
1
uncontrived(adjective, natural, casual, impulsive)
1
uncontrolled(adjective, natural, casual, impulsive)
1
unconventional(adjective, easy, plain, straightforward)
1
unforced(adjective, natural, casual, impulsive)
1
unfussy(adjective, easy, plain, relaxed)
1
unintentional(adjective, natural, chance, casual)
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APASmart Define. (2015). extempore thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/extempore/thesaurus/synonyms
ChicagoSmart Define. 2015. "extempore thesaurus" https://smartdefine.org/extempore/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, extempore thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/extempore/thesaurus/synonyms>.
MLASmart Define. "extempore thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/extempore/thesaurus/synonyms>