32 entries under oldness topic. ×

9
antediluvian(adjective, ancient)
7
archaic(adjective, ancient)
5
prehistoric(adjective, ancient)
2
antemundane
2
classic
2
primeval
2
primordial
1
aboriginal
1
ancestral
1
antebellum
1
colonial
1
preglacial
1
primitive
0
beginning
0
black-letter
0
diluvian
0
medieval
0
paleoanthropic
0
paleoanthropological
0
paleocrystic
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APASmart Define. (2015). fossil thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/fossil/thesaurus/synonyms
ChicagoSmart Define. 2015. "fossil thesaurus" https://smartdefine.org/fossil/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, fossil thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/fossil/thesaurus/synonyms>.
MLASmart Define. "fossil thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/fossil/thesaurus/synonyms>