communication channel vs plural

communication channel and plural both are nouns.

Word	Noun	Adjective	Verb	Adverb
communication channel	Yes	No	No	No
plural	Yes	Yes	No	No

communication channel (noun)	plural (noun)
(often plural) a means of communication or access	the form of a word that is used to denote more than one

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