14
fundamental(adjective, order, violent, important, opening)
14
inaugural(adjective, order, important, beginning, opening)
14
pre-eminent
13
earliest(adjective, adverb, start, simple, top)
13
ahead(adjective, adverb, order, advance, out)
13
maiden(adjective, start, beginning, opening, original)
13
primordial(adjective, order, start, important, significant)
12
early(adjective, order, start, beginning, opening)
12
firstly(adverb, initially)
12
incipient(adjective, order, beginning, original, origin)
12
introductory(adjective, order, beginning, opening, fresh)
12
start
11
front(adjective, order, lead, beginning, fresh)
11
opening(noun, adjective, order, start, original)
11
outstanding(adjective, good, bad, great, tough)
11
predominant(adjective, importance, outstanding, essential, prominent)
11
primeval(adjective, order, beginning, original, origin)
11
superior(adjective, good, quality, great, top)
10
champion(noun, adjective, good, bad, great)
10
elementary(adjective, order, important, opening, original)
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APASmart Define. (2016). first thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/first/thesaurus/synonyms
ChicagoSmart Define. 2016. "first thesaurus" https://smartdefine.org/first/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, first thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/first/thesaurus/synonyms>.
MLASmart Define. "first thesaurus" 31 March 2016. Web. 21 September 2026. <https://smartdefine.org/first/thesaurus/synonyms>