| inception | |
| inceptive(adjective, order, beginning, opening, original) | |
| instead(adverb, rather, sooner, preferably) | |
| nascent(adjective, beginning, opening, original, primary) | |
| precedent | |
| preceding(adjective, adverb, lower, opening, basic) | |
| prevailing | |
| primogenial(adjective, order) | |
| prototypical(adjective, original) | |
| significant(adjective, superior, unusual, important, rank) | |
| sooner than(adverb, rather) | |
| to start with(expression, idiom, adverb, formerly, basically) | |
| topflight(adjective, excellent, super, best, premium) | |
| number 1 | |
| 1st | |
| alternatively(adverb, rather, willingly, sooner, preferably) | |
| archetypal(previous, initial) | |
| banner(good, great, excellent, best, first-rate) | |
| before all else(expression, idiom, adverb, firstly, originally) | |
| consummate(adjective, top, superior, best, principal) |
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| APA | Smart Define. (2016). first thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/first/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "first thesaurus" https://smartdefine.org/first/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, first thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/first/thesaurus/synonyms>. |
| MLA | Smart Define. "first thesaurus" 31 March 2016. Web. 20 September 2026. <https://smartdefine.org/first/thesaurus/synonyms> |