-ISM VS -ISMO

English is a treasure-trove of oddities.  The ending (suffix) -ism has a phonetical peculiarity that must be practiced often by those who battle with English-acquiring hurdles.

It must be “-izm”, making sure you pronounce both the voiced “s” and the final “m.” (This is for Hispanic speakers.)

Go to a dictionary online and check and listen to:

Euphemism

Nationalism

Capitalism

Opportunism

Fundamentalism

Existentialism

Utilitarianism

This is more important than meets the “ear.”