Words similar to frontier

Example sentences for: frontier

How can you use “frontier” in a sentence? Here are some example sentences to help you improve your vocabulary:

After the break-up of the Mauryan empire, new invaders appeared on the northwest frontier.
Kendal became a frontier castle, and pele towers — square defensive structures, from the word pel, meaning stake — were attached to the larger houses in the Lakes were to provide additional protection.
Tucson was the frontier fortification of the Mexican state of Sonora until the Gadsden Purchase transferred it to the United States.
Woodward's book may not be online, but it's on the frontier of publishing.
' In light of U.S. history, such punishment is virtually a return to the lynching that was practised during the frontier development period."