roller skate vs athletics

roller skate and athletics both are nouns.

Word	Noun	Adjective	Verb	Adverb
roller skate	Yes	No	Yes	No
athletics	Yes	No	No	No

roller skate (noun)	athletics (noun)
a shoe with pairs of rollers fixed to the sole	an active diversion requiring physical exertion and competition
	participation in sports events as an extracurricular activity
	a contest between athletes

roller skate (verb)	athletics (verb)
travel on shoes with steel or rubber rollers attached to their soles