39 entries under borderline topic. ×
| outline(mark, edge, border, channel) | |
| rim(limit, edge, border, boundary) | |
| abuttals | |
| beginning | |
| boundary frontier | |
| circumference | |
| door | |
| entrance | |
| environs | |
| frame | |
| hem | |
| horizon | |
| mere | |
| outer limit(expression, border) | |
| purlieus | |
| radius | |
| side | |
| sideline | |
| state line(noun, expression, border) |
For more, visit
Frontier on
Power Thesaurus
| APA | Smart Define. (2015). frontier thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/frontier/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "frontier thesaurus" https://smartdefine.org/frontier/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, frontier thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/frontier/thesaurus/synonyms>. |
| MLA | Smart Define. "frontier thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/frontier/thesaurus/synonyms> |