athletics vs ineligible

athletics is a noun but ineligible is not a noun.

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

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

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