50 entries under borderline topic. ×

22
periphery(noun, area, part, turn, top)
21
boundary(noun, area, part, end, top)
18
margin(noun, part, top, edge, border)
16
circumference(noun, area, turn, limit, scope)
13
fringe(noun, edge, border, boundary)
13
limit(noun, area, part, top, scope)
12
ambit(noun, area, line, limit, scope)
12
compass(noun, area, turn, limit, scope)
11
brink(noun, area, edge, bound, border)
11
outline(noun, outline, edge, border)
11
bounds(noun, track, outline, trail, border)
10
side(noun, edge, bound, border, surplus)
9
limits(noun, border, frontier, boundaries)
7
confines(noun, area, line, limit, scope)
5
hem(noun, edge, bound, border, surplus)
5
skirt(noun, edge, bound, border, surplus)
3
extremity(noun, edge, border, frontier)
3
frame(noun, outline, edge, bound, border)
3
pale(noun, border, frontier)
2
borderland(border, frontier)
<123>
11 years ago|6.6k views|share |citing 
APASmart Define. (2015). perimeter thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/perimeter/thesaurus/synonyms
ChicagoSmart Define. 2015. "perimeter thesaurus" https://smartdefine.org/perimeter/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, perimeter thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/perimeter/thesaurus/synonyms>.
MLASmart Define. "perimeter thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/perimeter/thesaurus/synonyms>