beltway vs ringway

beltway and ringway both are nouns.

Word	Noun	Adjective	Verb	Adverb
beltway	Yes	No	No	No
ringway	Yes	No	No	No

As nouns, beltway and ringway are synonyms defined as:

beltway and ringway: a highway that encircles an urban area so that traffic does not have to pass through the center

Other synonyms of beltway include bypass, ring road.

beltway (noun)	ringway (noun)
a highway that encircles an urban area so that traffic does not have to pass through the center	a highway that encircles an urban area so that traffic does not have to pass through the center