athletics vs shadowbox

athletics is a noun but shadowbox is not a noun.

Word	Noun	Adjective	Verb	Adverb
athletics	Yes	No	No	No
shadowbox	No	No	Yes	No

athletics (noun)	shadowbox (noun)
an active diversion requiring physical exertion and competition
participation in sports events as an extracurricular activity
a contest between athletes

athletics (verb)	shadowbox (verb)
	go through boxing motions without an opponent