13
minor
9
ancillary
7
less important
5
unimportant
5
underdog
4
insignificant
3
auxiliary
3
interest
3
collateral(adjective, important, major, secondary, indirect)
3
dependent(noun, adjective, control, lead, manage)
3
acolyte
3
agent
3
aide
2
assisting
1
ally
1
appurtenant
1
aspect
1
assistant
1
atonalism
1
attendant
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APASmart Define. (2016). principal thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/principal/thesaurus/antonyms
ChicagoSmart Define. 2016. "principal thesaurus" https://smartdefine.org/principal/thesaurus/antonyms (accessed September 25, 2026).
HarvardSmart Define 2016, principal thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/principal/thesaurus/antonyms>.
MLASmart Define. "principal thesaurus" 29 March 2016. Web. 25 September 2026. <https://smartdefine.org/principal/thesaurus/antonyms>