fetishism vs belief

fetishism and belief both are nouns.

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

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

fetishism: a belief in the magical power of fetishes (or the worship of a fetish)
belief: any cognitive content held as true

fetishism (noun)	belief (noun)
sexual arousal or gratification resulting from handling a fetish (or a specific part of the body other than the sexual organs)	any cognitive content held as true
a belief in the magical power of fetishes (or the worship of a fetish)	a vague idea in which some confidence is placed