3
pungent(adjective, strong, offensive, sweet, foul)
3
repetitious(adjective, dull, hard, flat, stupid)
3
secondhand(deterioration, oldness)
3
tiring
3
unexciting(adjective, dull, flat, stupid, dry)
3
unflavored
3
unmoving(adjective, quiet, still, stationary)
3
unpalatable(adjective, dull, weak, flat, boring)
3
wearisome(adjective, dull, simple, flat, stupid)
3
weary
3
wearying
3
withered
3
zestless(adjective, hard, old, sour, musty)
2
aged
2
aging(noun, fading)
2
battered
2
bent(adjective, hard, old, sour, musty)
2
blah(adjective, dull, weak, simple, flat)
2
blown
2
bygone(original, dead, outdated, obsolete, antiquated)
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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>