389 entries under simple topic. ×

21
flat(noun, adjective, characteristic, calm, dull)
20
unpretentious(adjective, quiet, quality, mean, open)
19
lucid(adjective, calm, clear, easy)
19
pure(adjective, strong, right, clean)
19
understandable(adjective, clear, sharp, straightforward)
18
artless(adjective, open, direct, free)
18
stark(adjective, dull, pure, bare)
17
modest(adjective, quiet, mean, gentle)
17
unvarnished(adjective, tough, honest, exact)
16
definite(adjective, clear, sharp, flat)
16
sincere(adjective, good, clear, open, direct)
16
straight(adjective, calm, good, clear, strong)
15
commonplace(adjective, good, dull, mean)
15
ingenuous(adjective, good, open, direct, free)
14
austere(adjective, clean, harsh, pure)
14
clear-cut(adjective, clear, see, sharp)
14
comprehensible(adjective, clear, sharp, distinct)
14
dull(adjective, weak, tough, flat)
14
forthright(adjective, good, open, light, direct)
14
naive(adjective, open, direct, free)
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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>