87 entries under simple topic. ×

1
off-the-cuff(adjective, easy, plain, natural)
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off top of head(expression, adjective, idiom, natural)
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passable(adjective, ordinary, familiar, natural)
1
probable(adjective, ordinary, familiar, natural)
1
regular(adjective, ordinary, familiar, natural)
1
run-of-the-mill(adjective, ordinary, familiar, natural)
1
stale(adjective, ordinary, familiar, natural)
1
standard(adjective, ordinary, familiar, natural)
1
stereotyped(adjective, ordinary, familiar, natural)
1
stock(adjective, ordinary, familiar, natural)
1
trite(adjective, ordinary, familiar, natural)
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typical(adjective, ordinary, familiar, natural)
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unartful(adjective, natural, impulsive, willing)
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unavoidable(adjective, natural, impulsive, willing)
1
unbidden(adjective, natural, impulsive, willing)
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uncompelled(adjective, natural, impulsive, willing)
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undistinguished(adjective, lower, inferior, ordinary)
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unforced(adjective, calm, open, smooth)
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unpremediated(adjective, natural, impulsive, willing)
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unprompted(adjective, natural, impulsive, willing)
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APASmart Define. (2015). casual thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/casual/thesaurus/synonyms
ChicagoSmart Define. 2015. "casual thesaurus" https://smartdefine.org/casual/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, casual thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/casual/thesaurus/synonyms>.
MLASmart Define. "casual thesaurus" 1 December 2015. Web. 26 September 2026. <https://smartdefine.org/casual/thesaurus/synonyms>