vertical Antonyms

horizontal inclined skew oblique angle skew-whiff bowling green high-pitched arcked kitty-corner crossways transversely transverse slanting slantwise slopping sloped sloping slopy squinting swimming catercorner billiard table low-pitched backed away bent down bent forward bobbed down bowed and scraped at an inclination at an incline at an oblique angle bent over x-axis nonhierarchical upside down horizontal plane sideway slantingly slantways slopingly unerect chamfers sidewise canted cater-cornered chamfered chiselled circumflex crosswise declivitous