34 entries under adjective topic. ×

26
ancient(original, old, past, primitive)
17
old(original, past, primitive, early)
15
antediluvian(antiquated, before, oldness)
13
primeval(original, fixed, primitive, early)
12
antique(old, traditional, early, antiquated)
12
archaic(old, early, antique, antiquated)
12
primitive(original, old, past, ancient)
11
primordial(original, primitive, early, antique)
10
antiquated(old, early, antique, before)
10
early
8
prehistorical
7
earliest
6
old-fashioned(old, traditional, early, antique)
5
primal(primary, primeval)
4
Noachian
4
aboriginal
4
fossil
4
obsolete(noun, old, traditional, early)
4
olden
3
pristine
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APASmart Define. (2016). prehistoric thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/prehistoric/thesaurus/synonyms
ChicagoSmart Define. 2016. "prehistoric thesaurus" https://smartdefine.org/prehistoric/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, prehistoric thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/prehistoric/thesaurus/synonyms>.
MLASmart Define. "prehistoric thesaurus" 29 February 2016. Web. 25 September 2026. <https://smartdefine.org/prehistoric/thesaurus/synonyms>