160 entries under ordinary topic. ×

3
average(adjective, dull, simple, informal, inferior)
3
familiar(adjective, dull, moderate, flat, common)
3
garden-variety(adjective, dull, simple, moderate, clean)
3
heavy(adjective, dull, flat, dry)
3
prolix(adjective, flat, dry, boring)
3
quotidian(adjective, commonplace, everyday)
3
trivial(adjective, mean, simple, lower, obscure)
3
unexceptional(adjective, dull, simple, moderate, clean)
3
unoriginal(adjective, dull, moderate, stupid)
2
bromidic(adjective, dull, stupid, boring)
2
corny(adjective, dull, common, stupid)
2
customary(adjective, moderate, common, usual)
2
dull as dishwater(expression, adjective, idiom, dull, weak)
2
ho hum(expression, adjective, dull, weak, flat)
2
homely(adjective, simple, familiar, natural)
2
lackluster(adjective, dull, simple, clean, plain)
2
lowly(adjective, dull, simple, lower, clean)
2
nothing(adjective, dull, weak, simple, lower)
2
nowhere(adjective, dull, simple, moderate, plain)
2
old hat(expression, adjective, dull, stupid)
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APASmart Define. (2016). humdrum thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/humdrum/thesaurus/synonyms
ChicagoSmart Define. 2016. "humdrum thesaurus" https://smartdefine.org/humdrum/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, humdrum thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/humdrum/thesaurus/synonyms>.
MLASmart Define. "humdrum thesaurus" 23 March 2016. Web. 28 September 2026. <https://smartdefine.org/humdrum/thesaurus/synonyms>