extremist
[noun]
Synonyms: fanatic, die-hard, radical, zealot

[TahlilGaran] English Synonym Dictionary ▲

ex‧trem‧ist /ɪkˈstriːməst, ɪkˈstriːmɪst/ noun [countable]
[Word Family: noun: extreme, extremism, extremist, extremity; adjective: extreme, extremist; adverb: extremely]
someone who has extreme political opinions and aims, and who is willing to do unusual or illegal things in order to achieve them:
The bomb was planted by right-wing extremists.
—extremist adjective

[TahlilGaran] Dictionary of Contemporary English ▲

extremist
noun
ADJ. left-wing, right-wing an attack by right-wing extremists
political, religious | Muslim, Republican, etc.
EXTREMIST + NOUN group, party

[TahlilGaran] Collocations Dictionary ▲