18
fundamental(noun, adjective, body, material, important)
17
director(noun, control, person, manage, guide)
16
leader(noun, person, character, guide, head)
16
organic(adjective, important, significant, natural, animate)
15
pre-eminent
15
predominant(adjective, bad, great, excellent, extraordinary)
15
basic(adjective, body, material, important, significant)
15
lead(noun, adjective, person, advance, start)
14
premier(adjective, order, top, excellent, lead)
13
central(adjective, lead, important, head, significant)
13
prominent(adjective, good, important, wonderful, famous)
13
supreme(adjective, order, bad, tough, top)
12
administrator(noun, person, superior, head, boss)
12
arch(noun, adjective, order, top, lead)
12
commander(noun, control, manage, guide, head)
12
highest(adjective, order, bad, tough, top)
11
outstanding(adjective, bad, great, tough, top)
11
prevailing(adjective, important, usual, best, key)
11
sovereign(noun, adjective, excellent, superior, important)
11
superintendent(noun, control, person, manage, guide)
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APASmart Define. (2016). principal thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/principal/thesaurus/synonyms
ChicagoSmart Define. 2016. "principal thesaurus" https://smartdefine.org/principal/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, principal thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/principal/thesaurus/synonyms>.
MLASmart Define. "principal thesaurus" 29 March 2016. Web. 20 September 2026. <https://smartdefine.org/principal/thesaurus/synonyms>