ski vs athletics

ski and athletics both are nouns.

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

ski (noun)	athletics (noun)
narrow wood or metal or plastic runners used in pairs for gliding over snow	an active diversion requiring physical exertion and competition
	participation in sports events as an extracurricular activity
	a contest between athletes

ski (verb)	athletics (verb)
move along on skis