monorail vs railroad

monorail and railroad both are nouns.

Word	Noun	Adjective	Verb	Adverb
monorail	Yes	No	No	No
railroad	Yes	No	Yes	No

As nouns, railroad is a hypernym of monorail; that is, railroad is a word with a broader meaning than monorail:

monorail: a railway having a single track
railroad: line that is the commercial organization responsible for operating a system of transportation for trains that pull passengers or freight

Other hypernyms of monorail include railroad line, railway, railway line, railway system.

monorail (noun)	railroad (noun)
a railway having a single track	line that is the commercial organization responsible for operating a system of transportation for trains that pull passengers or freight
	a line of track providing a runway for wheels

monorail (verb)	railroad (verb)
	transport by railroad
	supply with railroad lines
	compel by coercion, threats, or crude means