quadrilateral Synonyms

tetragon four-sided quadrangle rhombus right-angled sapwood solid square squarer tetradic rhomboidal rhomboid rhombohedric rhombic rhomb rectangular rectangle quaternary quartile quartic quartet tetragonal tetrahedral trihedral trilateral triquetrous foursome boxy multifaceted quadrumvirate six-sided triclinic triangular tetrahedron tetravalent three-sided trapezium trapezohedral trapezoid trapezoidal triangle four-sided figure quadruplication bilateral equilateral four fourgon foursquare fourthly hexagon