70 entries under noun topic. ×

15
radical(adjective, person, concern, belief)
15
zealot(person, right, concern, belief)
14
fanatic(adjective, person, concern, interest)
12
revolutionary(adjective, person, concern, belief)
11
ultra(adjective, person, concern, belief)
8
immoderate(adjective, extreme)
7
revolutionist(person, concern, belief, edge)
6
agitator(belief, radical, rebel, progressive)
6
militant(adjective, radical, thorough, rebel)
6
ultraist(adjective, belief, enthusiastic, ill)
5
bigot(person, radical, conservative, partisan)
5
sectarian(person, radical, fanatic, partisan)
4
die-hard(adjective, belief, uncompromising, holder of extreme views)
4
enthusiast(radical, fanatic, intolerant, freak)
4
maverick(person, radical, rebel, eccentric)
4
reformer(rebel, fanatic, progressive, revolutionary)
3
anarchist
3
rebel(adjective, radical, eccentric, progressive)
2
activist(radical, fanatic, freak, revolutionary)
2
crusader(radical, zealot, fundamentalist)
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APASmart Define. (2015). extremist thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/extremist/thesaurus/synonyms
ChicagoSmart Define. 2015. "extremist thesaurus" https://smartdefine.org/extremist/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, extremist thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/extremist/thesaurus/synonyms>.
MLASmart Define. "extremist thesaurus" 13 April 2015. Web. 28 September 2026. <https://smartdefine.org/extremist/thesaurus/synonyms>