480 entries under adjective topic. ×

5
mildewed(dull, flat, silly, commonplace)
5
ordinary(dull, set, simple, flat)
5
overworked(excite, usual)
5
passé(hard, last, original, deterioration)
5
plain(dull, weak, simple, flat)
5
putrescent
5
routine(dull, set, simple, flat)
5
soured
5
stereotypic(excite, usual, trite)
5
strong(offensive, sweet, rank, corrupt)
5
uninspired(dull, set, weak, flat)
5
uninspiring(dull, simple, flat, clean)
5
worn-out(dull, set, hard, flat)
4
antediluvian(original, old, outdated, obsolete)
4
arid(dull, hard, flat, stupid)
4
cliché(noun, dull, set, hard)
4
dated(last, original, outdated, antiquated)
4
dilapidated
4
disagreeable
4
drab(dull, hard, weak, simple)
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APASmart Define. (2015). stale thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/stale/thesaurus/synonyms
ChicagoSmart Define. 2015. "stale thesaurus" https://smartdefine.org/stale/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, stale thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/stale/thesaurus/synonyms>.
MLASmart Define. "stale thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/stale/thesaurus/synonyms>