Brahmanism vs religious belief

Brahmanism and religious belief both are nouns.

Word	Noun	Adjective	Verb	Adverb
Brahmanism	Yes	No	No	No
religious belief	Yes	No	No	No

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

Brahmanism: the religious beliefs of ancient India as prescribed in the sacred Vedas and Brahmanas and Upanishads
religious belief: a strong belief in a supernatural power or powers that control human destiny

Other hypernyms of Brahmanism include faith, religion.

Brahmanism (noun)	religious belief (noun)
the religious beliefs of ancient India as prescribed in the sacred Vedas and Brahmanas and Upanishads	a strong belief in a supernatural power or powers that control human destiny
the religious and social system of orthodox Hinduism