| bounds(noun, limit, border, borderline) | |
| barrier(noun, border, borderline) | |
| delimitation | |
| march(noun, territory, edge, border, borderline) | |
| outskirts | |
| remote(adjective, limit, edge, distance, boundary) | |
| terminus(noun, limit, edge, border, borderline) | |
| threshold(borderline, verge) | |
| verge(noun, limit, edge, border, borderline) | |
| circumscription | |
| division | |
| mark | |
| mete | |
| precinct(noun, limit) | |
| back | |
| border line | |
| bordering | |
| boundary line | |
| brink(noun, area, limit, edge, border) | |
| confines(noun, border, borderline) |
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| APA | Smart Define. (2015). frontier thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/frontier/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "frontier thesaurus" https://smartdefine.org/frontier/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, frontier thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/frontier/thesaurus/synonyms>. |
| MLA | Smart Define. "frontier thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/frontier/thesaurus/synonyms> |