48 entries under frontier topic. ×

7
border(noun, borderline, boundary, circumjacence)
4
boundary(noun, limit, outline, border, station)
3
environs(border, borderline, district, circumjacence)
2
purlieus(border, borderline, circumjacence)
2
borderland(border, borderline)
2
line(border, borderline)
2
march(border, borderline)
2
marchland
2
perimeter(border, borderline)
2
periphery(border, borderline)
1
circumference(border, borderline, circumjacence)
1
edge(border, borderline, circumjacence)
1
fringe(border, borderline, district, environs)
1
precinct(border, borderline, district, environs)
0
abuttals(border, borderline)
0
beginning(border, borderline)
0
borderline
0
boundary frontier(expression, borderline)
0
bounds(border, borderline)
0
brink(border, borderline)
<123>
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APASmart Define. (2015). outpost thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/outpost/thesaurus/synonyms
ChicagoSmart Define. 2015. "outpost thesaurus" https://smartdefine.org/outpost/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, outpost thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/outpost/thesaurus/synonyms>.
MLASmart Define. "outpost thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/outpost/thesaurus/synonyms>