brahman vs smarta

brahman and smarta both are nouns.

Word	Noun	Adjective	Verb	Adverb
brahman	Yes	No	No	No
smarta	Yes	No	No	No

As nouns, smarta is a hyponym of brahman; that is, smarta is a word with a more specific, narrower meaning than brahman:

brahman: a member of the highest of the four Hindu varnas
smarta: one of a group of brahmans who uphold nonsectarian orthodoxy according to the Vedanta school of Hinduism

brahman (noun)	smarta (noun)
the highest of the four varnas: the priestly or sacerdotal category	one of a group of brahmans who uphold nonsectarian orthodoxy according to the Vedanta school of Hinduism
a member of the highest of the four Hindu varnas
a member of a social and cultural elite (especially a descendant of an old New England family)