multitude vs audience

multitude and audience both are nouns.

Word	Noun	Adjective	Verb	Adverb
multitude	Yes	No	No	No
audience	Yes	No	No	No

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

multitude: the common people generally
audience: the part of the general public interested in a source of information, entertainment, or a product/service

Other hyponyms of multitude include laity, temporalty, followers, following.

multitude (noun)	audience (noun)
a large gathering of people	a conference (usually with someone important)
the common people generally	a gathering of spectators or listeners at a (usually public) performance
a large indefinite quantity	the part of the general public interested in a source of information, entertainment, or a product/service
	an opportunity to state your case and be heard