railroad track vs rail

railroad track and rail both are nouns.

Word	Noun	Adjective	Verb	Adverb
railroad track	Yes	No	No	No
rail	Yes	No	Yes	No

railroad track (noun)	rail (noun)
a line of track providing a runway for wheels	any of numerous widely distributed small wading birds of the family Rallidae having short wings and very long toes for running on soft mud
	a horizontal bar (usually of wood or metal)
	a bar or pair of parallel bars of rolled steel making the railway along which railroad cars or other vehicles can roll
	a barrier consisting of a horizontal bar and supports
	short for railway

railroad track (verb)	rail (verb)
	complain bitterly
	spread negative information about
	criticize severely
	fish with a handline over the rails of a boat
	lay with rails
	travel by rail or train
	separate with a railing
	convey (goods etc.) by rails
	provide with rails
	enclose with rails