many-sided
multilateral
bifacial
bilateral
biquadratic
cube-shaped
cubed
cubic
cubiform
cuboid
diced
dihedral
flanked
four
four-legged
four-rayed
foursquare
handed
lateral
oblong
one-sided
orthogonal
polyhedral
quadrangular
quadrate
quadric
quadriform
quadrinomial
quadrivalent
quadruped
quartic
quartile
quaternary
rectangular
rhombic
rhomboid
sided
square
tetractinal
tetrad
tetragonal
tetrahedral
tetravalent
three-sided
trapezohedral
trapezoid
trihedral
trilateral
triquetrous
control-panel
eidolon
face-centered
fifteen-foot
formidable-looking
non-existant
octangular
one-storied
open-plan
pentagon
polygon
rhomboidal
right-angled
simple-looking
six-sided
square-based
up-river
well-like