98 entries under tedious topic. ×

5
flavorless(adjective, dull, weak, flat, boring)
5
ordinary(adjective, dull, set, simple, flat)
5
plain(adjective, dull, weak, simple, flat)
5
routine(adjective, dull, set, simple, flat)
5
uninspiring(adjective, dull, simple, flat, clean)
5
worn-out(adjective, dull, set, hard, flat)
4
arid(adjective, dull, hard, flat, stupid)
4
drab(adjective, dull, hard, weak, simple)
4
spiritless(adjective, dull, weak, flat, cold)
4
wishy-washy(adjective, dull, stupid, ordinary, boring)
3
heavy(adjective, flat, warm, ordinary, dry)
3
mundane(adjective, dull, simple, plain, common)
3
prosy(adjective, dull, mean, weak, simple)
3
repetitious(adjective, dull, hard, flat, stupid)
3
unexciting(adjective, dull, flat, stupid, dry)
3
unpalatable(adjective, dull, weak, flat, boring)
3
wearisome(adjective, dull, simple, flat, stupid)
2
blah(adjective, dull, weak, simple, flat)
2
colorless(adjective, dull, mean, weak, simple)
2
ho hum(expression, adjective, dull, weak, flat)
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APASmart Define. (2015). stale thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/stale/thesaurus/synonyms
ChicagoSmart Define. 2015. "stale thesaurus" https://smartdefine.org/stale/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, stale thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/stale/thesaurus/synonyms>.
MLASmart Define. "stale thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/stale/thesaurus/synonyms>