Antonyms of noun parallelogram

1 sense of parallelogram

Sense 1

parallelogram -- (a quadrilateral whose opposite sides are both parallel and equal in length)

Antonym of trapezium (Sense 1)

=> trapezium -- (a quadrilateral with no parallel sides)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun parallelogram

1 sense of parallelogram

Sense 1

parallelogram -- (a quadrilateral whose opposite sides are both parallel and equal in length)

=> quadrilateral, quadrangle, tetragon -- (a four-sided polygon)