10
basic(adjective, important, head, significant, beginning)
10
pivotal(adjective, important, essential)
10
big-league(adjective, lead, importance, head, master)
10
cay(noun, island)
10
leading(adjective, important, head, significant, beginning)
10
momentous(adjective, importance, valuable, main, notable)
9
big(adjective, importance, valuable, main, notable)
9
clue(noun, information, sign, influence, report)
9
consequential(adjective, importance, valuable, main, notable)
9
constitutive(adjective, importance, valuable, essential, main)
9
critical(adjective, important, significant, essential, basic)
9
cue(noun, act, sign, report, prompt)
9
earnest(adjective, importance, valuable, main, notable)
9
outstanding(adjective, importance, valuable, main, notable)
9
significant(adjective, importance, valuable, main, notable)
8
fateful(adjective, importance, valuable, main, notable)
8
grave(adjective, importance, valuable, main, notable)
8
great(adjective, importance, valuable, main, notable)
8
influential(adjective, importance, valuable, main, notable)
8
password(noun, permit, opening, answer, confidence)
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APASmart Define. (2016). key thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/key/thesaurus/synonyms
ChicagoSmart Define. 2016. "key thesaurus" https://smartdefine.org/key/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, key thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/key/thesaurus/synonyms>.
MLASmart Define. "key thesaurus" 29 March 2016. Web. 21 September 2026. <https://smartdefine.org/key/thesaurus/synonyms>