callisthenics vs plural

callisthenics and plural both are nouns.

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

callisthenics (noun)	plural (noun)
the practice of calisthenic exercises	the form of a word that is used to denote more than one
light exercises designed to promote general fitness

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