pariah vs leper

pariah and leper both are nouns.

Word	Noun	Adjective	Verb	Adverb
pariah	Yes	No	No	No
leper	Yes	No	No	No

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

Other hyponyms of pariah include heretic, misbeliever, religious outcast, Harijan, untouchable.

pariah (noun)	leper (noun)
a person who is rejected (from society or home)	a pariah who is avoided by others
	a person afflicted with leprosy