0
observer
0
obstructionist
0
obstructor
0
oppose
0
opposite number(expression, ally)
0
oppositeness
0
opposition
0
predictable
0
preventer
0
protester
0
rat(companion, friend, buddy, comrade, pal)
0
reactionary
0
rebel
0
receiver
0
rejector
0
resistance
0
resister
0
rival
0
skeptic
0
sprite
10 years ago|1k views|share |citing 
APASmart Define. (2016). backer thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/backer/thesaurus/antonyms
ChicagoSmart Define. 2016. "backer thesaurus" https://smartdefine.org/backer/thesaurus/antonyms (accessed September 25, 2026).
HarvardSmart Define 2016, backer thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/backer/thesaurus/antonyms>.
MLASmart Define. "backer thesaurus" 30 March 2016. Web. 25 September 2026. <https://smartdefine.org/backer/thesaurus/antonyms>