motorway vs freeway

motorway and freeway both are nouns.

Word	Noun	Adjective	Verb	Adverb
motorway	Yes	No	No	No
freeway	Yes	No	No	No

As nouns, motorway and freeway are synonyms defined as:

Other synonyms of motorway include expressway, pike, state highway, superhighway, throughway, thruway.

motorway (noun)	freeway (noun)
a broad highway designed for high-speed traffic	a broad highway designed for high-speed traffic