4
bounds(noun, limit, border, borderline)
4
barrier(noun, border, borderline)
4
delimitation
4
march(noun, territory, edge, border, borderline)
4
outskirts
4
remote(adjective, limit, edge, distance, boundary)
4
terminus(noun, limit, edge, border, borderline)
4
threshold(borderline, verge)
4
verge(noun, limit, edge, border, borderline)
3
circumscription
3
division
3
mark
3
mete
3
precinct(noun, limit)
3
back
3
border line
3
bordering
3
boundary line
3
brink(noun, area, limit, edge, border)
3
confines(noun, border, 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>