roller skate vs sport

roller skate and sport both are nouns.

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

roller skate (noun)	sport (noun)
a shoe with pairs of rollers fixed to the sole	an active diversion requiring physical exertion and competition
	the occupation of athletes who compete for pay
	verbal wit or mockery (often at another's expense but not to be taken seriously)
	someone who engages in sports
	(biology) an organism that has characteristics resulting from chromosomal alteration
	a person known for the way she (or he) behaves when teased or defeated or subjected to trying circumstances
	(Maine colloquial) a temporary summer resident of Maine

roller skate (verb)	sport (verb)
travel on shoes with steel or rubber rollers attached to their soles	play boisterously
	wear or display in an ostentatious or proud manner