| fringe(border, borderline, frontier) |
| frontier(border, borderline) |
| hem(border, borderline, frontier) |
| horizon(border, borderline, frontier) |
| limit(border, borderline, frontier) |
| limits(border, borderline, frontier) |
| line(border, borderline, frontier) |
| line of demarcation(noun, expression, idiom, line, edge) |
| march(border, borderline, frontier) |
| margin(border, borderline, frontier) |
| mark(border, borderline, frontier) |
| mere(border, borderline, frontier) |
| mete(noun, line, edge, border, borderline) |
| outer limit(expression, border, borderline, frontier) |
| outline(border, borderline, frontier) |
| outpost(border, borderline, frontier) |
| pale(border, borderline, frontier) |
| perimeter(border, borderline, frontier) |
| periphery(border, borderline, frontier) |
| precinct(border, borderline, frontier) |