Midway and Middle-of-the-road

Midway adjective - Equally distant from the extremes.

Middle-of-the-road and midway are semantically related in middle topic. In some cases you can use "Middle-of-the-road" instead an adjective "Midway", when it comes to topics like edge.

Middle-of-the-road adjective - Avoiding major social change or extreme political ideas.

Midway and middle-of-the-road are semantically related in moderate topic. You can use "Midway" instead the phrase "Middle-of-the-road" as an adjective or a noun, if it concerns topics such as edge.