39 entries under border topic. ×

36
boundary(noun, territory, limit, edge)
23
limit(noun, mark, limit, edge)
16
borderland(noun, territory, edge, contiguity)
16
line(noun, mark, stroke)
8
edge(noun, outline)
7
hinterland(noun, backcountry)
6
extremity(noun, limit, edge, borderline)
4
bounds(noun, limit, borderline)
4
barrier(noun, borderline)
4
march(noun, territory, edge, borderline)
4
outskirts
4
terminus(noun, limit, edge, borderline)
4
verge(noun, limit, edge, borderline)
3
brink(noun, area, limit, edge)
3
confines(noun, borderline)
3
limits
3
outpost(noun, station, borderline)
3
perimeter(noun, borderline, verge, threshold)
3
periphery(noun, borderline, verge, threshold)
3
termination(noun, limit, edge, borderline)
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APASmart Define. (2015). frontier thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/frontier/thesaurus/synonyms
ChicagoSmart Define. 2015. "frontier thesaurus" https://smartdefine.org/frontier/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, frontier thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/frontier/thesaurus/synonyms>.
MLASmart Define. "frontier thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/frontier/thesaurus/synonyms>