2
first-class(adjective, good, excellent, exceptional, better)
2
first-string(good, head, original, better, prime)
2
former
2
front(adjective, order, heavy, head, beginning)
2
genetic
2
genuine(first, previous, initial)
2
grave(big, important, significant, substantial, serious)
2
honorable(adjective, fine, pure, important, significant)
2
impressive(adjective, fine, important, significant, grand)
2
in embryo(expression, idiom, cause)
2
in ovo(expression, idiom, cause)
2
inceptive(adjective, head, beginning, original, prime)
2
inchoate(original, first, early)
2
infant(original, first, previous, early, initial)
2
initiative(original, first, early)
2
integral(adjective, body, material, important, significant)
2
lead(noun, verb, adjective, top, excellent)
2
most(adjective, adverb, big, large, essential)
2
natal
2
particular(adjective, superior, unusual, exceptional, distinct)
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APASmart Define. (2016). primary thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/primary/thesaurus/synonyms
ChicagoSmart Define. 2016. "primary thesaurus" https://smartdefine.org/primary/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, primary thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/primary/thesaurus/synonyms>.
MLASmart Define. "primary thesaurus" 29 March 2016. Web. 21 September 2026. <https://smartdefine.org/primary/thesaurus/synonyms>