| orthogonal(adjective, regular, square, patterned, symmetrical) | |
| quadrangular(adjective, square, angularity, four, four-sided) | |
| square(adjective, regular, angularity, patterned, symmetrical) | |
| perpendicular(verticality, perpendicularity) | |
| normal | |
| oblong(adjective, protracted, rounded, elongated, ovated) | |
| right-angled(adjective, regular, square, patterned, symmetrical) | |
| quadrilateral(adjective, square, angularity, four, equilateral) | |
| foursquare(adjective, regular, square, angularity, patterned) | |
| cubical | |
| elliptical | |
| cubed | |
| cubic | |
| elliptic | |
| plumb | |
| quadrate(adjective, regular, square, symmetrical, angled) | |
| rectangle | |
| rhomboid | |
| tetragonal(adjective, four-sided, right-angled) | |
| elongated |
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| APA | Smart Define. (2015). Rectangular thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/rectangular/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "Rectangular thesaurus" https://smartdefine.org/rectangular/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, Rectangular thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/rectangular/thesaurus/synonyms>. |
| MLA | Smart Define. "Rectangular thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/rectangular/thesaurus/synonyms> |