Back street and Throughway

Back street noun - A narrow street with walls on both sides.

Throughway and back street are semantically related in road topic. In some cases you can use "Throughway" instead a noun phrase "Back street", when it comes to topics like path upon which travel occurs.

Throughway noun - A broad highway designed for high-speed traffic.

Back street and throughway are semantically related in road topic. Sometimes you can use "Back street" instead a noun "Throughway", if it concerns topics such as path upon which travel occurs.