4
vindicator(noun, person, advocate, champion, hero)
3
proposer(noun, supporter, sponsor, backer, fighter)
3
booster(noun, support, advocate, supporter, fan)
3
counsel(noun, supporter, sponsor, backer, fighter)
3
pro(noun, person, debate, supporter)
3
subscriber(noun, person)
2
justifier
2
ally(noun, advocate, fan, follower, champion)
2
apostle(noun, advocate, supporter, sponsor, backer)
2
confederate(support, stay, rock, champion, partisan)
2
counselor
2
devotee(noun, fan, follower, partisan, stalwart)
2
endorser(noun, stay, advocate, champion, partisan)
2
espouser(noun, support, stay, rock, champion)
2
helper(noun, support, double, fan, follower)
2
hero(noun, champion, winner, defender, champ)
2
ideologue
2
index
2
party
2
seconder(noun, support, person, advocate, supporter)
11 years ago|3.8k views|share |citing 
APASmart Define. (2015). proponent thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/proponent/thesaurus/synonyms
ChicagoSmart Define. 2015. "proponent thesaurus" https://smartdefine.org/proponent/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, proponent thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/proponent/thesaurus/synonyms>.
MLASmart Define. "proponent thesaurus" 13 April 2015. Web. 21 September 2026. <https://smartdefine.org/proponent/thesaurus/synonyms>