48 entries under noun topic. ×

20
square(adjective, form, square, angularity)
16
quadrangle(form, figure, shape, angularity)
13
rectangle(square, diamond, angularity, four)
11
diamond(adjective, form, angularity, oblong)
8
four(adjective, four)
8
parallelogram(form, shape, square, diamond)
8
polygon(form, shape, angularity)
6
tetragon
4
foursome
4
quad(adjective, four)
4
quartet(adjective, four)
4
rhombus(square, diamond, angularity, oblong)
4
trapezoid
4
triangle
3
decagon
3
heptagon
3
hexagon
3
octagon
3
pentagon
2
cube
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APASmart Define. (2015). quadrilateral thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/quadrilateral/thesaurus/synonyms
ChicagoSmart Define. 2015. "quadrilateral thesaurus" https://smartdefine.org/quadrilateral/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, quadrilateral thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/quadrilateral/thesaurus/synonyms>.
MLASmart Define. "quadrilateral thesaurus" 14 April 2015. Web. 29 September 2026. <https://smartdefine.org/quadrilateral/thesaurus/synonyms>