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140 entries under adjective topic. ×

1
tedious(dull, weak, simple, plain)
1
tired(stupid, ordinary, commonplace, bland)
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tiresome(dull, simple, boring, tedious)
1
toneless(dull, boring, tedious, dreary)
1
tripe(stupid, ordinary, commonplace, bland)
1
trite(dull, simple, stupid, ordinary)
1
unchanged(dull, flat, boring, tedious)
1
unchanging(dull, flat, boring, tedious)
1
unexciting(dull, weak, plain, mild)
1
uniform(dull, flat, boring, tedious)
1
unimaginative(dull, stupid, ordinary, boring)
1
uninflected(dull, flat, boring, tedious)
1
uninspiring(dull, weak, plain, mild)
1
uninteresting(dull, weak, simple, plain)
1
unoriginal(dull, stupid, ordinary, boring)
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unrelieved(dull, flat, boring, tedious)
1
unstimulating(dull, weak, plain, mild)
1
unvarying(dull, flat, boring, tedious)
1
vanilla(dull, weak, plain, mild)
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vapid(dull, weak, plain, mild)
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APASmart Define. (2015). dull as dishwater thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/dull_as_dishwater/thesaurus/synonyms
ChicagoSmart Define. 2015. "dull as dishwater thesaurus" https://smartdefine.org/dull_as_dishwater/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, dull as dishwater thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/dull_as_dishwater/thesaurus/synonyms>.
MLASmart Define. "dull as dishwater thesaurus" 10 April 2015. Web. 1 October 2026. <https://smartdefine.org/dull_as_dishwater/thesaurus/synonyms>