337 entries under adjective topic. ×

18
fundamental(noun, body, material, important)
16
organic(important, significant, natural, animate)
15
pre-eminent
15
predominant(bad, great, excellent, extraordinary)
15
basic(body, material, important, significant)
15
lead(noun, person, advance, start)
14
premier(order, top, excellent, lead)
13
central(lead, important, head, significant)
13
prominent(good, important, wonderful, famous)
13
supreme(order, bad, tough, top)
12
arch(noun, order, top, lead)
12
highest(order, bad, tough, top)
11
outstanding(bad, great, tough, top)
11
prevailing(important, usual, best, key)
11
sovereign(noun, excellent, superior, important)
11
uppermost(excellent, lead, important, rank)
10
executive(noun, rank, master, post)
10
overriding(serious, basic, prime, supreme)
10
vital(body, great, importance, material)
9
elementary(important, significant, original, essential)
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APASmart Define. (2016). principal thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/principal/thesaurus/synonyms
ChicagoSmart Define. 2016. "principal thesaurus" https://smartdefine.org/principal/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, principal thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/principal/thesaurus/synonyms>.
MLASmart Define. "principal thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/principal/thesaurus/synonyms>