quadrilateral (n.)
- biquadratic
- cuboid
- four
- foursquare
- lateral
- oblong
- quadrate
- quadric
- quadruped
- quartic
- quartile
- quaternary
- rhomboid
- square
- tetrad
- trapezoid
- trilateral
quadrilateral (adj.)
- bifacial
- bilateral
- biquadratic
- cube-shaped
- cubic
- cubiform
- cuboid
- diced
- four
- foursquare
- handed
- lateral
- many-sided
- multilateral
- oblong
- one-sided
- orthogonal
- polyhedral
- quadrangular
- quadrate
- quadruped
- quaternary
- rectangular
- rhombic
- rhomboid
- sided
- square
- tetragonal
- tetravalent
- three-sided
- trilateral
- two-sided
- unilateral
