132 entries under natural topic. ×

9
unornamented(adjective, simple, reasonable, clean, pure)
8
humble(adjective, quiet, mean, simple, reasonable)
8
innocent(adjective, open, simple, easy, friendly)
8
lowly(adjective, quiet, simple, gentle, poor)
8
run-of-the-mill(adjective, good, dull, simple, flat)
8
unadulterated(adjective, simple, clean, pure, true)
7
vanilla(adjective, dull, weak, simple, flat)
7
workaday(adjective, simple, pure, common, ordinary)
6
conventional(adjective, simple, pure, common, ordinary)
6
folksy(adjective, open, simple, easy, clean)
6
informal(adjective, simple, common, ordinary, familiar)
6
real(adjective, good, open, direct, free)
6
regular(adjective, calm, quiet, open, smooth)
6
uncluttered(adjective, simple, sharp, clean, pure)
6
unrefined(adjective, simple, common, usual)
5
childlike(adjective, open, simple, easy, honest)
5
crude(adjective, weak, simple, poor, common)
5
jejune(adjective, dull, simple, flat, stupid)
5
true(adjective, good, clear, open, simple)
5
unalloyed(adjective, simple, clean, honest, pure)
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APASmart Define. (2016). plain thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/plain/thesaurus/synonyms
ChicagoSmart Define. 2016. "plain thesaurus" https://smartdefine.org/plain/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, plain thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/plain/thesaurus/synonyms>.
MLASmart Define. "plain thesaurus" 31 March 2016. Web. 26 September 2026. <https://smartdefine.org/plain/thesaurus/synonyms>