| cutting edge | |
| extreme(noun, limit, edge, boundary) | |
| extremes(limit, edge, boundary) | |
| front line | |
| limiting factor(expression, idiom) | |
| limits(border, borderline) | |
| marchland(noun, territory, edge, borderline) | |
| outpost(noun, border, station, borderline) | |
| perimeter(noun, border, borderline, verge, threshold) | |
| periphery(noun, border, borderline, verge, threshold) | |
| skirt | |
| stint(noun, limit) | |
| termination(noun, limit, edge, border, borderline) | |
| backcountry | |
| boondocks | |
| crease | |
| demarcation | |
| foreword | |
| head | |
| lap |
For more, visit
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Power Thesaurus
| APA | Smart Define. (2015). frontier thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/frontier/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "frontier thesaurus" https://smartdefine.org/frontier/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, frontier thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/frontier/thesaurus/synonyms>. |
| MLA | Smart Define. "frontier thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/frontier/thesaurus/synonyms> |