78 entries under adjective topic. ×

6
medieval(old, oldness, having)
6
outdated(last, original, old, venerable)
6
outmoded(original, old, venerable, outdated)
6
superannuated(original, dead, old, outdated)
5
aboriginal(last, original, past, primitive)
5
old-time(new, last, original, primitive)
5
olden(new, original, old, primitive)
5
timeworn(new, prehistoric)
4
out of date
4
stale(original, old, outdated, obsolete)
3
Noachian
3
earliest
3
old hat
3
original(last, past, primitive, primary)
2
dead(out, unfashionable, antique, antiquated)
2
disused(dead, tired, out, bent)
2
elderly
2
mouldy
2
obsolescent(old, unfashionable, outdated, obsolete)
2
oracle bones(antique, ancient, archaic)
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APASmart Define. (2015). antediluvian thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/antediluvian/thesaurus/synonyms
ChicagoSmart Define. 2015. "antediluvian thesaurus" https://smartdefine.org/antediluvian/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, antediluvian thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/antediluvian/thesaurus/synonyms>.
MLASmart Define. "antediluvian thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/antediluvian/thesaurus/synonyms>