ineligible vs athletics

ineligible is not a noun while athletics is a noun.

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

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

ineligible (adjective)	athletics (adjective)
not eligible
prohibited by official rules