94 entries under borderline topic. ×

8
confines(noun, check, curb, limit, restraint)
7
pale(noun, boundary, frontier)
7
threshold(noun, beginning, edge, boundary)
5
ambit(noun, edge, margin, frontier)
5
door(noun, beginning, boundary, frontier)
5
entrance(noun, beginning, boundary, frontier)
5
marchland(noun, territory, edge, boundary)
5
mete(noun, frontier)
5
outpost(noun, boundary, frontier, circumjacence)
5
share(verb, break, top, split, copy)
4
beginning(noun, boundary, frontier)
4
borderland(noun, territory, line, edge)
4
limits(noun, frontier)
4
termination(noun, check, curb, limit, restraint)
3
sideline(noun, edge, boundary, margin)
3
terminus(noun, limit, edge, boundary)
2
demarcation(noun, split, class, share, branch)
2
department(noun, break, split, disagreement, class)
2
dividing line(noun, expression, idiom, break, split)
2
environs(noun, line, limit, edge, term)
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APASmart Define. (2016). border thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/border/thesaurus/synonyms
ChicagoSmart Define. 2016. "border thesaurus" https://smartdefine.org/border/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, border thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/border/thesaurus/synonyms>.
MLASmart Define. "border thesaurus" 30 March 2016. Web. 21 September 2026. <https://smartdefine.org/border/thesaurus/synonyms>