11 entries under four topic. ×

13
square(noun, figure, piece, square, diamond)
12
quadrilateral(noun, square, diamond, angularity)
7
quadrangle(noun, figure, angularity, quadrilateral)
4
tetragon
4
quadrature(noun, angularity)
3
four
3
foursome
3
quadrille
3
quartet
2
quadrennium
1
tetract
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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>