11
radical(noun, adjective, person, excessive, liberal)
10
left-winger(noun, radical, liberal, rebel, fanatic)
8
left(noun, adjective, radical, liberal)
8
liberal(noun, adjective, dissentient, liberalism, progressiveness)
8
progressive(noun, adjective, liberal, rebel, fanatic)
6
left-wing(adjective, liberal)
5
extremist(noun, adjective, thorough, rebel, uncompromising)
5
fanatic(noun, rebel, progressive, revolutionary, militant)
5
revolutionist
4
collectivist
4
insurgent
4
left-of-center
4
left wing(noun, expression, idiom, person, group)
4
nonconformist(noun, rebel, fanatic, progressive, revolutionary)
3
agitator(noun, person, advocate, radical, rebel)
3
communist
3
rebel(noun, radical, fanatic, progressive, partisan)
3
red
3
reformer(noun, radical, rebel, progressive, revolutionary)
2
lefty
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APASmart Define. (2015). leftist thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/leftist/thesaurus/synonyms
ChicagoSmart Define. 2015. "leftist thesaurus" https://smartdefine.org/leftist/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, leftist thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/leftist/thesaurus/synonyms>.
MLASmart Define. "leftist thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/leftist/thesaurus/synonyms>