4
arbiter
4
referee
3
judge
3
arbitrator
2
intermediary
2
middle man(business, person, merchant, intermediary)
2
minor party
2
umpire
1
mediator
1
opposition party
1
camp
1
city hall
1
faction
1
machine
1
major party
1
moderator
1
multiple party system(expression, idiom)
1
party in power(expression, idiom)
1
political machine
1
political party
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APASmart Define. (2015). third party thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/third_party/thesaurus/synonyms
ChicagoSmart Define. 2015. "third party thesaurus" https://smartdefine.org/third_party/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, third party thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/third_party/thesaurus/synonyms>.
MLASmart Define. "third party thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/third_party/thesaurus/synonyms>