43 entries under plain topic. ×

14
stale(adjective, dull, set, hard, simple)
14
trite(adjective, dull, set, hard, simple)
12
commonplace(adjective, dull, set, hard, simple)
11
pedestrian(noun, adjective, dull, set, simple)
10
banal(adjective, dull, set, hard, simple)
8
hackneyed(adjective, dull, set, hard, simple)
8
common(adjective, dull, set, hard, simple)
4
dull(adjective, set, hard, simple, flat)
4
flat(adjective, dull, set, hard, simple)
4
ordinary(adjective, dull, set, simple, flat)
4
vapid(adjective, dull, set, simple, flat)
3
humdrum(adjective, dull, simple, clean)
3
prose(adjective, simple, clean, ordinary)
2
mundane(adjective, dull, simple, stupid)
2
nothing(adjective, dull, simple, clean)
2
nowhere(adjective, dull, simple, clean)
2
square(adjective, simple, clean, stupid)
2
unimaginative(adjective, dull, simple, stupid)
2
zero(adjective, dull, simple, clean)
1
actual(adjective, simple, clean, ordinary)
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APASmart Define. (2015). platitudinous thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/platitudinous/thesaurus/synonyms
ChicagoSmart Define. 2015. "platitudinous thesaurus" https://smartdefine.org/platitudinous/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, platitudinous thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/platitudinous/thesaurus/synonyms>.
MLASmart Define. "platitudinous thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/platitudinous/thesaurus/synonyms>