superhighway

In us|lang=en terms the difference between turnpike and superhighway

is that turnpike is (us) a toll road, especially a toll expressway while superhighway is (us) an expressway, especially one designed for high speeds.

As nouns the difference between turnpike and superhighway

is that turnpike is a frame consisting of two bars crossing each other at right angles and turning on a post or pin, to hinder the passage of animals, but admitting a person to pass between the arms; a turnstile while superhighway is (us) an expressway, especially one designed for high speeds.

As a verb turnpike

is to form (a road, etc) in the manner of a turnpike road; into a rounded form, as the path of a road.

As nouns the difference between causeway and superhighway

is that causeway is a road that is raised, as to be above water, marshland etc while superhighway is (us) an expressway, especially one designed for high speeds.

As nouns the difference between freeway and superhighway

is that freeway is (australia|canada|us) a road designed for safe, high-speed operation of motor vehicles through the elimination of at-grade intersections, usually divided and having at least two lanes in each direction; a dual carriageway with no at-grade crossings, a motorway while superhighway is (us) an expressway, especially one designed for high speeds.

As nouns the difference between superhighway and highway

is that superhighway is an expressway, especially one designed for high speeds while highway is a main, direct public road, especially a multi-lane, high speed thoroughfare connecting major population centers.