79 entries under borderline topic. ×

7
beginning(noun, limit, outline, border)
7
horizon(noun, limit, outline, extent, border)
7
outpost(noun, limit, outline, border, station)
7
purlieus(noun, area, limit, scope, range)
7
radius(noun, area, influence, limit, scope)
5
circumscription(noun, area, limit, scope, range)
4
line of demarcation(noun, expression, idiom, limit, border)
3
divide(noun, break, split, disagreement, class)
3
environs(noun, area, limit, scope, range)
2
divider(noun, break, split, disagreement, class)
2
marchland(noun, territory, edge, frontier)
2
mere(noun, limit, border, frontier)
2
partition(split, class, distinction, section)
1
abuttals(noun, limit, border, frontier)
1
affiliate(noun, break, split, disagreement, class)
1
associate(noun, break, split, disagreement, class)
1
branch(noun, break, split, disagreement, class)
1
category(noun, break, split, disagreement, class)
1
chunk(noun, break, split, disagreement, class)
1
class(noun, break, split, disagreement, share)
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APASmart Define. (2015). boundary thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/boundary/thesaurus/synonyms
ChicagoSmart Define. 2015. "boundary thesaurus" https://smartdefine.org/boundary/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, boundary thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/boundary/thesaurus/synonyms>.
MLASmart Define. "boundary thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/boundary/thesaurus/synonyms>