quadrangle vs trapezoid

quadrangle and trapezoid both are nouns.

Word	Noun	Adjective	Verb	Adverb
quadrangle	Yes	No	No	No
trapezoid	Yes	No	No	No

As nouns, trapezoid is a hyponym of quadrangle; that is, trapezoid is a word with a more specific, narrower meaning than quadrangle:

Other hyponyms of quadrangle include parallelogram, trapezium.

quadrangle (noun)	trapezoid (noun)
a rectangular area surrounded on all sides by buildings	the wrist bone between the trapezium and the capitate bones
a four-sided polygon	a quadrilateral with two parallel sides