frontier Synonyms

bush country bounds boundary line borderline rural area hinterland boondocks back country confines verge threshold periphery perimeter pale state line borderland borders border line limits outskirts backcountry vanguardist liminal Marches outback dividing line limbic demarcation line marchland outpost mete margin conterminable confine circumscription butting brink bourn boundary boundaries bordering border boarder bound backwoods conterminate delimitation margent marge march