10
rectangular(adjective, regular, square, patterned, symmetrical)
6
perpendicular(adjective, verticality, perpendicularity)
6
normal
5
extraneous
5
immaterial
5
square(adjective, regular, patterned, symmetrical, angled)
4
right-angled(adjective, regular, square, patterned, symmetrical)
3
impertinent
3
plumb
2
coherent
2
foreign
2
foursquare(adjective, regular, square, patterned, symmetrical)
2
quadrangular(adjective, four-sided, quadrilateral, right-angled)
2
quadrate(adjective, regular, square, symmetrical, angled)
2
quadrilateral(square, equilateral)
2
tetragonal(adjective, four-sided, right-angled)
2
uncorrelated
2
vertical
1
altruistic
1
bolt
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APASmart Define. (2016). orthogonal thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/orthogonal/thesaurus/synonyms
ChicagoSmart Define. 2016. "orthogonal thesaurus" https://smartdefine.org/orthogonal/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, orthogonal thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/orthogonal/thesaurus/synonyms>.
MLASmart Define. "orthogonal thesaurus" 15 February 2016. Web. 20 September 2026. <https://smartdefine.org/orthogonal/thesaurus/synonyms>