pacifism vs belief

pacifism and belief both are nouns.

Word	Noun	Adjective	Verb	Adverb
pacifism	Yes	No	No	No
belief	Yes	No	No	No

As nouns, belief is a hypernym of pacifism; that is, belief is a word with a broader meaning than pacifism:

pacifism: the belief that all international disputes can be settled by arbitration
belief: any cognitive content held as true

pacifism (noun)	belief (noun)
the doctrine that all violence is unjustifiable	any cognitive content held as true
the belief that all international disputes can be settled by arbitration	a vague idea in which some confidence is placed