cubic
three-dimensional
3-D
cube-shaped
cubed
cubiform
cuboid
diced
dimensional
flat
foursquare
fourth-dimensional
oblong
orthogonal
proportional
quadrangular
quadrate
quadriform
quadrilateral
rectangular
rhombic
rhomboid
space
space-time
spatial
spatiotemporal
spherical
square
stereoscopic
superficial
surface
tetragonal
tetrahedral
trapezohedral
trapezoid
two-dimensional
volumetric
15-mile
cinder-block
closet-sized
disc-shaped
fist-sized
geodesic
hexagonal
laser-cooled
lenticular
non-smoking
pentagonal
pyramidal
rocklike
siliceous
single-story
squared-off
three-and-a-half
threedimensional
white-painted