ascetic vs religious person

ascetic and religious person both are nouns.

Word	Noun	Adjective	Verb	Adverb
ascetic	Yes	Yes	No	No
religious person	Yes	No	No	No

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

ascetic (noun)	religious person (noun)
someone who practices self denial as a spiritual discipline	a person who manifests devotion to a deity

ascetic (adjective)	religious person (adjective)
pertaining to or characteristic of an ascetic or the practice of rigorous self-discipline
practicing great self-denial