375 entries under adjective topic. ×

6
maiden(start, opening, original, first)
6
mainstream(characteristic, quality, standard, prevailing)
6
nascent(pure, original, first, early)
6
opening(head, beginning, original, basic)
6
pioneer(start, head, beginning, original)
6
prevailing(good, outstanding, better, prominent)
6
seminal(cause, generative)
6
sovereign(excellent, outstanding, head, prominent)
5
best(excellent, lead, superior, unusual)
5
flagship(lead, head, master, boss)
5
formative
5
great(important, significant, vital, imperative)
5
inaugural(order, heavy, important, head)
5
momentous(superior, big, unusual, important)
5
most important
5
number one(expression, order, lead, heavy)
5
overruling(importance, serious, essential, basic)
5
plain(simple, pure, straightforward, basic)
5
preeminent(order, top, excellent, superior)
5
preparatory(basic, introductory)
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APASmart Define. (2016). primary thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/primary/thesaurus/synonyms
ChicagoSmart Define. 2016. "primary thesaurus" https://smartdefine.org/primary/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, primary thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/primary/thesaurus/synonyms>.
MLASmart Define. "primary thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/primary/thesaurus/synonyms>