laity vs hoi polloi

laity and hoi polloi both are nouns.

Word	Noun	Adjective	Verb	Adverb
laity	Yes	No	No	No
hoi polloi	Yes	No	No	No

As nouns, hoi polloi is a hypernym of laity; that is, hoi polloi is a word with a broader meaning than laity:

laity: in Christianity, members of a religious community that do not have the priestly responsibilities of ordained clergy
hoi polloi: the common people generally

Other hypernyms of laity include mass, masses, multitude, people, the great unwashed.

laity (noun)	hoi polloi (noun)
in Christianity, members of a religious community that do not have the priestly responsibilities of ordained clergy	the common people generally