79 entries under plain topic. ×

2
pabulum(adjective, dull, quiet, weak, simple)
2
platitudinous(adjective, dull, simple, clean)
2
prosaic(adjective, dull, simple, flat)
2
stale(adjective, dull, weak, simple, flat)
2
tame(adjective, dull, quiet, weak, simple)
2
trite(adjective, dull, simple, stupid)
2
vanilla(adjective, dull, weak, simple, flat)
2
wishy-washy(adjective, dull, quiet, weak, gentle)
1
tasteless(adjective, weak, flat, informal)
1
unimaginative(adjective, dull, simple, flat)
1
actual(adjective, simple, flat, clean)
1
clean(adjective, simple, flat, ordinary)
1
common(adjective, dull, simple, lower)
1
dead(adjective, dull, simple, flat)
1
diddly(noun, adjective, simple, flat, clean)
1
dry(adjective, dull, simple, flat, clean)
1
dull as dishwater(expression, adjective, idiom, dull, weak)
1
everyday(adjective, simple, stupid, ordinary)
1
flavorless(adjective, dull, weak, flat)
1
garden-variety(adjective, simple, flat, clean)
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APASmart Define. (2015). zero thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/zero/thesaurus/synonyms
ChicagoSmart Define. 2015. "zero thesaurus" https://smartdefine.org/zero/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, zero thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/zero/thesaurus/synonyms>.
MLASmart Define. "zero thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/zero/thesaurus/synonyms>