| restriction(noun, area, limit, scope, range) | |
| beginning(noun, limit, outline, border, borderline) | |
| frame(noun, limit, outline, edge, bound) | |
| horizon(noun, limit, outline, extent, border) | |
| liminal | |
| outpost(noun, limit, outline, border, station) | |
| purlieus(noun, area, limit, scope, range) | |
| radius(noun, area, influence, limit, scope) | |
| skirt(noun, limit, outline) | |
| threshold | |
| tip(noun, end, top, point, limit) | |
| boundary line(noun, expression, idiom) | |
| bourn(noun, limit) | |
| mete(noun, limit) | |
| term(noun, close, end, top, point) | |
| circumscription(noun, area, limit, scope, range) | |
| coastal(adjective, edge) | |
| cutoff(noun, limit) | |
| delimitation | |
| hem(noun, limit, outline, edge, trim) |
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| APA | Smart Define. (2015). boundary thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/boundary/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "boundary thesaurus" https://smartdefine.org/boundary/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, boundary thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/boundary/thesaurus/synonyms>. |
| MLA | Smart Define. "boundary thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/boundary/thesaurus/synonyms> |