The word "catercornered," sometimes spelled "catty-cornered," describes an angle or position that is diagonal or situated at an angle to something else. Antonyms, or words that have the opposite meaning of "catercornered," include parallel, perpendicular, and straight. Parallel refers to lines or surfaces that run alongside each other without intersecting, while perpendicular describes lines or surfaces that intersect at a right angle. Straight refers to a line or surface that is uncurved or unbroken, with no angles or turns. These antonyms are useful for describing objects or situations that are situated in a linear or geometrically aligned manner.