6
informal(adjective, simple, common, ordinary, familiar)
6
luminous(adjective, clear, straightforward, obvious, articulate)
6
mild(adjective, calm, dull, quiet, mean)
6
pampas(noun, prairie)
6
pedestrian(adjective, simple, indifferent, ordinary, modest)
6
poor(adjective, mean, weak, simple, common)
6
positive(adjective, clear, flat, firm, honest)
6
precise(adjective, calm, clear, smooth, right)
6
public(adjective, clear, friendly, appropriate, ordinary)
6
real(adjective, good, open, direct, free)
6
regular(adjective, calm, quiet, open, smooth)
6
restrained(adjective, calm, simple, sensible, pure)
6
savanna(noun, grassland, prairie)
6
subpar(adjective, weak, poor, miserable, inferior)
6
uncluttered(adjective, simple, sharp, clean, pure)
6
undeniable(adjective, clear, simple, firm, true)
6
unmingled(adjective, simple, clean, genuine, wholesome)
6
unmitigated(adjective, big, limited)
6
unpatterned
6
unpleasing(adjective, appearance, ugly, aroused negative)
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APASmart Define. (2016). plain thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/plain/thesaurus/synonyms
ChicagoSmart Define. 2016. "plain thesaurus" https://smartdefine.org/plain/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, plain thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/plain/thesaurus/synonyms>.
MLASmart Define. "plain thesaurus" 31 March 2016. Web. 21 September 2026. <https://smartdefine.org/plain/thesaurus/synonyms>