What does "radicalism" mean?

Any of various radical social or political movements that aim at fundamental change in the structure of society

How do you pronounce "radicalism"?

Pronounced //ˈradɪkəlɪz(ə)m//.

Common synonyms include: abandon, anarchism, anarcho-syndicalism, boundlessness, conversion, criminal syndicalism.

/ˈradɪkəlɪz(ə)m/ noun

noun ·Moderate ·College level

Noun

1
Any of various radical social or political movements that aim at fundamental change in the structure of society countable, uncountable
2
the political orientation of those who favor revolutionary change in government and society wordnet

"Islamic radicalism is a danger for Algeria."

From radical + -ism.