Frontier and Presidio

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

Presidio and frontier are semantically related. In some cases you can use "Presidio" instead a noun "Frontier".

Nearby Word: frontiersman

Presidio noun - A fortress established in the southwestern United States by the Spanish in order to protect their missions and other holdings.

Frontier and presidio are semantically related. Sometimes you can use "Frontier" instead a noun "Presidio".