Street and Throughway

Street noun - A passage cleared for public vehicular travel.

Throughway and street are semantically related In some cases you can use "Throughway" instead a noun "Street".

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

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