sit out vs athletics

sit out is not a noun while athletics is a noun.

Word	Noun	Adjective	Verb	Adverb
sit out	No	No	Yes	No
athletics	Yes	No	No	No

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

sit out (verb)	athletics (verb)
endure to the end
not participate in (an activity, such as a dance or a sports event)