Brahmanism vs religion

Brahmanism and religion both are nouns.

Word	Noun	Adjective	Verb	Adverb
Brahmanism	Yes	No	No	No
religion	Yes	No	No	No

As nouns, religion is a hypernym of Brahmanism; that is, religion 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
religion: a strong belief in a supernatural power or powers that control human destiny

Other hypernyms of Brahmanism include faith, religious belief.

Brahmanism (noun)	religion (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	an institution to express belief in a divine power