5
primo(adjective, adverb, quality, bad, tough)
5
prototype(noun, original, example)
5
showtime
5
starting(noun, adjective, start, beginning, opening)
5
topmost(adjective, top, excellent, lead, fine)
5
tough(adjective, quality, bad, top, perfect)
4
get-go
4
alpha(noun, adjective, beginning)
4
at the outset(expression, idiom, adverb, basically, originally)
4
authentic(adjective, original, previous, initial)
4
by choice(expression, adverb, rather, willingly, sooner)
4
central(adjective, top, important, significant, original)
4
earlier(adjective, adverb, old, past, advanced)
4
eldest(adjective, rank, post, status, age)
4
first off(verb, expression, adjective, adverb, phrasal verb)
4
fore(adjective, rank, post, status, age)
4
in the forefront(expression, adjective, idiom, forward)
4
precursory(adjective, beginning)
4
prominent(adjective, important, outstanding, head, essential)
4
ruling(adjective, top, excellent, fine, superior)
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APASmart Define. (2016). first thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/first/thesaurus/synonyms
ChicagoSmart Define. 2016. "first thesaurus" https://smartdefine.org/first/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, first thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/first/thesaurus/synonyms>.
MLASmart Define. "first thesaurus" 31 March 2016. Web. 20 September 2026. <https://smartdefine.org/first/thesaurus/synonyms>