Freeway and Tollgate

Freeway noun - A passage cleared for public vehicular travel.

Tollgate and freeway are semantically related In some cases you can use "Tollgate" instead a noun "Freeway".

Tollgate noun - A gate or bar across a toll bridge or toll road which is lifted when the toll is paid.

Freeway and tollgate are semantically related in highway topic. You can use "Freeway" instead a noun "Tollgate".