85 entries under adjective topic. ×

15
radical(noun, person, concern, belief)
14
fanatic(noun, person, concern, interest)
12
revolutionary(noun, person, concern, belief)
11
ultra(noun, person, concern, belief)
10
extreme(concern, enthusiastic, ill, sick)
8
immoderate(noun, extreme)
6
rabid(concern, violent, ill, extreme)
6
militant(noun, radical, thorough, rebel)
6
ultraist(noun, belief, enthusiastic, ill)
5
excessive
5
fanatical(concern, enthusiastic, ill, extreme)
4
die-hard(noun, belief, uncompromising, holder of extreme views)
3
progressive
3
rebel(noun, radical, eccentric, progressive)
2
bigoted(enthusiastic, ill, sick, fervent)
2
diehard(noun, person, conservative, fanatic)
2
irrational(enthusiastic, ill, sick, fervent)
1
advanced
1
basal
1
berserk(enthusiastic, ill, sick, fervent)
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APASmart Define. (2015). extremist thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/extremist/thesaurus/synonyms
ChicagoSmart Define. 2015. "extremist thesaurus" https://smartdefine.org/extremist/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, extremist thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/extremist/thesaurus/synonyms>.
MLASmart Define. "extremist thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/extremist/thesaurus/synonyms>