54 entries under noun topic. ×
| skirt | |
| stint | |
| termination(limit, edge, border, borderline) | |
| crease | |
| wilderness | |
| ambit(border, borderline) | |
| extent(border, borderline) | |
| area | |
| cord | |
| domain | |
| midpoint | |
| reaches | |
| region | |
| state line(expression, border, borderline) |
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| APA | Smart Define. (2015). frontier thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/frontier/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "frontier thesaurus" https://smartdefine.org/frontier/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2015, frontier thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/frontier/thesaurus/synonyms>. |
| MLA | Smart Define. "frontier thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/frontier/thesaurus/synonyms> |