waterworks vs plural

waterworks and plural both are nouns.

Word	Noun	Adjective	Verb	Adverb
waterworks	Yes	No	No	No
plural	Yes	Yes	No	No

waterworks (noun)	plural (noun)
workplace where water is stored and purified and distributed for a community	the form of a word that is used to denote more than one
a public utility that provides water

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