plural form vs callisthenics

plural form and callisthenics both are nouns.

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

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