Synonyms of frontier
borderDictionary • It wasn't difficult to cross the frontier.
border • Clifford is enjoying life north of the border.
limit • the city limits
edge • She was standing at the water's edge.
boundary • Drug traffickers operate across national boundaries.
verge (British) • The car pulled over on to the verge off the road.
perimeter • They walked round the perimeter of the stadium.
borderline • the borderline between painting and photography
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borderThe border between two countries or regions is the dividing line between them. Sometimes the border also refers to the land close to this line.
• Clifford is enjoying life north of the border.
borderlineThe borderline between two different or opposite things is the division between them.
• the borderline between painting and photography
• Drug traffickers operate across national boundaries.
Thesaurus for frontier from the Collins English Thesaurus
the region of a country bordering on another or a line, barrier, etc, marking such a boundary