pluralism vs ism

pluralism and ism both are nouns.

Word	Noun	Adjective	Verb	Adverb
pluralism	Yes	No	No	No
ism	Yes	No	No	No

As nouns, ism is a hypernym of pluralism; that is, ism is a word with a broader meaning than pluralism:

pluralism: the doctrine that reality consists of several basic substances or elements
ism: a belief (or system of beliefs) accepted as authoritative by some group or school

Other hypernyms of pluralism include doctrine, philosophical system, philosophy, school of thought.

pluralism (noun)	ism (noun)
the practice of one person holding more than one benefice at a time	a belief (or system of beliefs) accepted as authoritative by some group or school
the doctrine that reality consists of several basic substances or elements
a social organization in which diversity of racial or religious or ethnic or cultural groups is tolerated