24 entries under the past topic. ×

21
old(adjective, feature, characteristic, detail, new)
14
obsolete(adjective, last, original, old, venerable)
8
extinct(adjective, dead, out, unfashionable, antiquated)
7
bygone(original, dead, old, venerable, outdated)
5
antebellum
3
has-been(dead, tired, out, bent, antiquated)
3
past(last, original, primitive, venerable, unfashionable)
1
blown over(verb, expression, phrasal verb)
1
elapsed
1
expired
1
exploded
1
forgotten
1
gone
1
lapsed
1
over
1
passed away(verb, phrasal verb)
0
foregone
0
gone by(verb, phrasal verb)
0
irrecoverable
0
never to return(expression, idiom)
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APASmart Define. (2015). antediluvian thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/antediluvian/thesaurus/synonyms
ChicagoSmart Define. 2015. "antediluvian thesaurus" https://smartdefine.org/antediluvian/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, antediluvian thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/antediluvian/thesaurus/synonyms>.
MLASmart Define. "antediluvian thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/antediluvian/thesaurus/synonyms>