47 entries under frontier topic. ×
| radius(border, borderline) | |
| rim(control, limit, border, borderline) | |
| side(bar, border, obstruction, borderline) | |
| skirt(border, borderline) | |
| state line(expression, border, borderline) | |
| terminal(border, borderline) | |
| terminus(border, borderline) |
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| APA | Smart Define. (2015). barrier thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/barrier/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "barrier thesaurus" https://smartdefine.org/barrier/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, barrier thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/barrier/thesaurus/synonyms>. |
| MLA | Smart Define. "barrier thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/barrier/thesaurus/synonyms> |