60 entries under decayed topic. ×

72
antiquated(adjective, feature, characteristic, dull, hard)
41
passé(adjective, feature, characteristic, dull, hard)
39
out-of-date(adjective, feature, characteristic, dull, hard)
27
past(adjective, hard, last, odd, sour)
16
stale(adjective, beat, hard, last, dead)
12
timeworn(adjective, beat, hard, new, dead)
9
hackneyed(adjective, beat, hard, informal, last)
8
unoriginal(adjective, hard, last, tired, remote)
7
tired(adjective, beat, hard, common, feeble)
6
worn-out(adjective, hard, common, last, feeble)
5
threadbare(adjective, beat, hard, feeble, tired)
5
trite(adjective, hard, tired, sour, stale)
5
dead(verb, adjective, phrasal verb, hard, odd)
4
banal(adjective, hard, tired, sour, stale)
4
moth-eaten(adjective, hard, last, dead, tired)
4
out(adjective, hard, dead, odd, sour)
4
fusty(adjective, dull, hard, new, sour)
4
musty(adjective, hard, odd, sour, stale)
3
corny(adjective, hard, tired, odd, sour)
3
dry(adjective, hard, sour, stale, musty)
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APASmart Define. (2016). old thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/old/thesaurus/synonyms
ChicagoSmart Define. 2016. "old thesaurus" https://smartdefine.org/old/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, old thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/old/thesaurus/synonyms>.
MLASmart Define. "old thesaurus" 29 February 2016. Web. 22 September 2026. <https://smartdefine.org/old/thesaurus/synonyms>