Border line and Frontier

Frontier and border line are semantically related in border topic. In some cases you can use "Frontier" instead the phrase "Border line" as a noun or an adjective, when it comes to topics like boundary.

Frontier noun - A region along the dividing line between two countries.

Border line and frontier are semantically related in border topic. You can use "Border line" instead a noun "Frontier", if it concerns topics such as boundary.

Nearby Word: frontiersman