hoi polloi vs laity

hoi polloi and laity both are nouns.

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

As nouns, laity is a hyponym of hoi polloi; that is, laity is a word with a more specific, narrower meaning than hoi polloi:

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

Other hyponyms of hoi polloi include temporalty, audience, followers, following.

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