close quarters vs plural

close quarters and plural both are nouns.

Word	Noun	Adjective	Verb	Adverb
close quarters	Yes	No	No	No
plural	Yes	Yes	No	No

close quarters (noun)	plural (noun)
a situation of being uncomfortably close to someone or something	the form of a word that is used to denote more than one

close quarters (adjective)	plural (adjective)
	grammatical number category referring to two or more items or units
	composed of more than one member, set, or kind