carriageway vs superhighway

carriageway and superhighway both are nouns.

Word	Noun	Adjective	Verb	Adverb
carriageway	Yes	No	No	No
superhighway	Yes	No	No	No

carriageway (noun)	superhighway (noun)
one of the two sides of a motorway where traffic travels in one direction only usually in two or three lanes	a broad highway designed for high-speed traffic
	an extensive electronic network (such as the internet) used for the rapid transfer of sound and video and graphics in digital form