elevated railroad vs overhead railway

elevated railroad and overhead railway both are nouns.

Word	Noun	Adjective	Verb	Adverb
elevated railroad	Yes	No	No	No
overhead railway	Yes	No	No	No

As nouns, elevated railroad and overhead railway are synonyms defined as:

elevated railroad and overhead railway: a railway that is powered by electricity and that runs on a track that is raised above the street level

Other synonyms of elevated railroad include el, elevated, elevated railway.

elevated railroad (noun)	overhead railway (noun)
a railway that is powered by electricity and that runs on a track that is raised above the street level	a railway that is powered by electricity and that runs on a track that is raised above the street level