sit out vs sport

sit out is not a noun while sport is a noun.

Word	Noun	Adjective	Verb	Adverb
sit out	No	No	Yes	No
sport	Yes	No	Yes	No

sit out (noun)	sport (noun)
	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

sit out (verb)	sport (verb)
endure to the end	play boisterously
not participate in (an activity, such as a dance or a sports event)	wear or display in an ostentatious or proud manner