7 entries under rectilinear topic. ×
| vertical(noun, adjective, smooth, sharp, solid) | |
| erect(verb, adjective, smooth, sharp, solid) | |
| plumb(adjective, smooth, solid, short, straight) | |
| straight(adjective, direct, right, level, straight) | |
| horizontal | |
| even | |
| level |
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| APA | Smart Define. (2015). perpendicular thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/perpendicular/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "perpendicular thesaurus" https://smartdefine.org/perpendicular/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, perpendicular thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/perpendicular/thesaurus/synonyms>. |
| MLA | Smart Define. "perpendicular thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/perpendicular/thesaurus/synonyms> |