Synonyms|17Antonyms|0|Broader|0Narrower|0Related|0
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beginning(borderline, frontier)
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border(borderline, frontier)
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borderline
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boundary(borderline, frontier)
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door(borderline, frontier)
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edge(borderline, frontier)
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entrance(borderline, frontier)
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frontier
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line(borderline, frontier)
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march(borderline, frontier)
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marchland(borderline, frontier)
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outpost(borderline, frontier)
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pale(borderline, frontier)
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perimeter(borderline, frontier)
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sideline(borderline, frontier)
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state line(expression, borderline, frontier)
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threshold(borderline, frontier)
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APASmart Define. (1970). boundary frontier thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/boundary_frontier/thesaurus/synonyms
ChicagoSmart Define. 1970. "boundary frontier thesaurus" https://smartdefine.org/boundary_frontier/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 1970, boundary frontier thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/boundary_frontier/thesaurus/synonyms>.
MLASmart Define. "boundary frontier thesaurus" 1 January 1970. Web. 21 September 2026. <https://smartdefine.org/boundary_frontier/thesaurus/synonyms>