389 entries under simple topic. ×

7
vanilla(adjective, dull, weak, flat)
7
workaday(adjective, pure, common, ordinary)
6
conventional(adjective, pure, common, ordinary)
6
crystalline(adjective, clear, straightforward, precise)
6
essential(adjective, pure, straightforward, basic)
6
folksy(adjective, open, easy, clean)
6
garden-variety(adjective, good, indifferent, ordinary)
6
informal(adjective, common, ordinary, familiar)
6
mild(adjective, calm, dull, quiet, mean)
6
pedestrian(adjective, indifferent, ordinary, modest)
6
poor(adjective, mean, weak, common)
6
restrained(adjective, calm, sensible, pure)
6
uncluttered(adjective, sharp, clean, pure)
6
undeniable(adjective, clear, firm, true)
6
unmingled(adjective, clean, genuine, wholesome)
6
unrefined(adjective, common, natural, usual)
5
childlike(adjective, open, easy, honest)
5
crude(adjective, weak, poor, common)
5
effortless(adjective, quiet, clear, light, smooth)
5
jejune(adjective, dull, flat, stupid)
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APASmart Define. (2016). plain thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/plain/thesaurus/synonyms
ChicagoSmart Define. 2016. "plain thesaurus" https://smartdefine.org/plain/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, plain thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/plain/thesaurus/synonyms>.
MLASmart Define. "plain thesaurus" 31 March 2016. Web. 22 September 2026. <https://smartdefine.org/plain/thesaurus/synonyms>