190 entries under plain topic. ×

12
crude(adjective, simple, rough, violent)
12
honest(adjective, open, free, simple, correct)
12
open(adjective, calm, free, smooth, simple)
12
raw(adjective, simple, clean, new)
12
straightforward(adjective, open, direct, free, simple)
11
frank(adjective, open, free, simple, easy)
11
informal(adjective, adverb, calm, open, smooth)
11
unpretentious(adjective, calm, open, smooth, simple)
10
casual(adjective, adverb, calm, open, smooth)
10
innocent(adjective, open, smooth, simple, friendly)
10
unstudied(adjective, open, simple, reasonable, clean)
9
easygoing(adjective, calm, simple, informal)
9
familiar(adjective, calm, open, free, smooth)
9
folksy(adjective, open, simple, clean)
9
relaxed(adjective, simple, familiar, straightforward)
8
childlike(adjective, open, simple, honest)
8
homely(adjective, simple, clean, informal)
8
reasonable(adjective, simple, sensible, restrained)
8
unadorned(adjective, simple, reasonable, clean)
8
unrefined(adjective, simple, coarse, straightforward)
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APASmart Define. (2016). natural thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/natural/thesaurus/synonyms
ChicagoSmart Define. 2016. "natural thesaurus" https://smartdefine.org/natural/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, natural thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/natural/thesaurus/synonyms>.
MLASmart Define. "natural thesaurus" 15 February 2016. Web. 25 September 2026. <https://smartdefine.org/natural/thesaurus/synonyms>