perpendicular Antonyms

parallel oblique at an oblique angle oblique angle crossways oblique case transversely transverse slopy sloped slopping slantwise slanting sideways sidelong kitty-corner catacorner at an incline at an inclination slopingly slantways slantingly sideway upside down nonparallel nonintersecting nonconvergent kitty-cornered catty-cornered catty-corner catercorner sideling recumbent procumbent collateral circumflex cater-cornered canted billowing beveling bevelled beveled atilt aslope aslant askew antiparallel crosswise diagonal pitched