244 entries under dull topic. ×

6
endless(adjective, monotonous)
6
long-drawn-out(adjective, boring, late, dreary)
6
wishy-washy(adjective, weak, plain, mild)
5
arduous(adjective, difficult, tender, boring)
5
deadly(adjective, dry, boring, dreary)
5
difficult(adjective, tender, boring, raw)
5
hackneyed(adjective, simple, flat, plain)
5
hard(adjective, difficult, tender, boring)
5
mortal(adjective, monotonous, weariness)
5
prolonged(adjective, slow, boring, late)
5
repetitive(adjective, flat, ordinary, dry)
5
spiritless(adjective, weak, stupid, boring)
5
threadbare(adjective, flat, stupid, dry)
5
tired(adjective, flat, ordinary, dry)
4
characterless(adjective, flat, stupid, boring)
4
disheartening(adjective, gloomy, miserable)
4
dispiriting(adjective, gloomy, miserable, boring)
4
dragging(adjective, slow, boring, dreary)
4
dusty(adjective, simple, boring, dreary)
4
exasperating(adjective, boring, irritating, annoying)
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APASmart Define. (2015). tedious thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/tedious/thesaurus/synonyms
ChicagoSmart Define. 2015. "tedious thesaurus" https://smartdefine.org/tedious/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, tedious thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/tedious/thesaurus/synonyms>.
MLASmart Define. "tedious thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/tedious/thesaurus/synonyms>