Synonyms|111Antonyms|37|Broader|3Narrower|5Related|285
4
prehistoric(adjective, before)
3
antediluvian
3
embryonic(beginning, opening, original, authentic, first)
3
oldest(adjective, aged, eldest)
3
opening(beginning, original, best, authentic, first)
3
premier
3
savage(adjective, wild, untamed)
3
soonest
2
ancient
2
germinal(beginning, opening, original, first, primary)
2
headmost(beginning, opening, original, first, primary)
2
inaugural(adjective, beginning, opening, original, best)
2
initiatory(adjective, beginning, opening, original, first)
2
leadoff(adjective, beginning)
2
old
2
soon
2
starting(adjective, authentic, first, previous, initial)
1
Noachian
1
Noachic
1
antecedent(beginning, opening, original, first, primary)
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APASmart Define. (2016). earliest thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/earliest/thesaurus/synonyms
ChicagoSmart Define. 2016. "earliest thesaurus" https://smartdefine.org/earliest/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, earliest thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/earliest/thesaurus/synonyms>.
MLASmart Define. "earliest thesaurus" 13 March 2016. Web. 22 September 2026. <https://smartdefine.org/earliest/thesaurus/synonyms>