60 entries under predictable topic. ×

7
stale(adjective, dull, simple, flat, clean)
7
tired(adjective, dull, flat, stupid, ordinary)
7
trite(adjective, dull, simple, flat, plain)
6
stock(adjective, dull, flat, stupid, ordinary)
5
conventional(adjective, dull, weak, common, stupid)
4
general(adjective, simple, moderate, common, ordinary)
4
normal(adjective, dull, moderate, common, ordinary)
4
plain(adjective, dull, weak, simple, flat)
4
stereotyped(adjective, dull, moderate, common, stupid)
4
typical(adjective, moderate, common, ordinary, familiar)
3
trivial(adjective, mean, simple, lower, obscure)
3
unoriginal(adjective, dull, moderate, stupid, ordinary)
2
bromidic(adjective, dull, stupid, ordinary, boring)
2
corny(adjective, dull, common, stupid, ordinary)
2
customary(adjective, moderate, common, ordinary, usual)
2
dull as dishwater(expression, adjective, idiom, dull, weak)
2
ho hum(expression, adjective, dull, weak, flat)
2
nothing(adjective, dull, weak, simple, lower)
2
nowhere(adjective, dull, simple, moderate, plain)
2
old hat(expression, adjective, dull, stupid, ordinary)
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APASmart Define. (2016). humdrum thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/humdrum/thesaurus/synonyms
ChicagoSmart Define. 2016. "humdrum thesaurus" https://smartdefine.org/humdrum/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, humdrum thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/humdrum/thesaurus/synonyms>.
MLASmart Define. "humdrum thesaurus" 23 March 2016. Web. 21 September 2026. <https://smartdefine.org/humdrum/thesaurus/synonyms>