35 entries under frontier topic. ×

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environs(border, borderline)
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horizon(border, borderline)
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limits(border, borderline)
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line of demarcation(expression, idiom, border, borderline)
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mark(border, borderline)
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mere(border, borderline)
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mete(border, borderline)
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outer limit(expression, border, borderline)
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outpost(border, borderline)
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pale(border, borderline)
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precinct(border, borderline)
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purlieus(edge, border, borderline)
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radius(border, borderline)
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state line(expression, border, borderline)
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terminal(limit, edge, border, borderline, boundary)
<12>
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APASmart Define. (2015). brink thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/brink/thesaurus/synonyms
ChicagoSmart Define. 2015. "brink thesaurus" https://smartdefine.org/brink/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, brink thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/brink/thesaurus/synonyms>.
MLASmart Define. "brink thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/brink/thesaurus/synonyms>