plurality vs large number

plurality and large number both are nouns.

Word	Noun	Adjective	Verb	Adverb
plurality	Yes	No	No	No
large number	Yes	No	No	No

As nouns, plurality and large number are synonyms defined as:

Other synonyms of plurality include battalion, multitude, pack.

plurality (noun)	large number (noun)
(in an election with more than 2 options) the number of votes for the candidate or party receiving the greatest number (but less than half of the votes)	a large indefinite quantity
a large indefinite quantity
the state of being plural