91 entries under original topic. ×

11
primeval(adjective, order, beginning, origin)
10
elementary(adjective, order, important, opening)
10
eminent(adjective, importance, important, high)
10
primitive(adjective, order, important, basic)
9
aboriginal(adjective, order, beginning, existing)
9
essential(adjective, important, significant, prominent)
9
initiatory(adjective, beginning, opening, basic)
8
initiative(adjective, beginning, opening, primary)
8
major(adjective, top, superior, unusual, important)
8
pristine(adjective, order, simple, clean, pure)
7
former(adjective, order, time, past)
7
pioneer(adjective, pronoun, order, start)
6
advanced(adjective, lead, importance, sophisticated)
6
antecedent(adjective, order, old, primary)
6
preliminary(adjective, beginning, opening, basic)
5
number one(noun, verb, expression, adjective, phrasal verb)
5
headmost(adjective, order, top, lead, important)
5
prototype(noun, example)
4
authentic(adjective, previous, initial)
4
central(adjective, top, important, significant)
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APASmart Define. (2016). first thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/first/thesaurus/synonyms
ChicagoSmart Define. 2016. "first thesaurus" https://smartdefine.org/first/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, first thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/first/thesaurus/synonyms>.
MLASmart Define. "first thesaurus" 31 March 2016. Web. 22 September 2026. <https://smartdefine.org/first/thesaurus/synonyms>