53 entries under noun topic. ×

13
square(figure, piece, square, diamond)
12
quadrilateral(square, diamond, angularity, four)
7
quadrangle(figure, angularity, four, quadrilateral)
5
oblong(figure, quadrilateral)
5
block
5
parallelogram(figure, square, diamond, angularity)
4
cube
4
tetragon
4
figure
4
polygon
4
quadrature(angularity, four)
4
rhombus(square, diamond, angularity, oblong)
3
diamond
3
four
3
foursome
3
quadrille
3
quartet
3
tetrahedron
2
decagon
2
heptagon
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APASmart Define. (2016). rectangle thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/rectangle/thesaurus/synonyms
ChicagoSmart Define. 2016. "rectangle thesaurus" https://smartdefine.org/rectangle/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, rectangle thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/rectangle/thesaurus/synonyms>.
MLASmart Define. "rectangle thesaurus" 11 February 2016. Web. 22 September 2026. <https://smartdefine.org/rectangle/thesaurus/synonyms>