Noncoplanar means not lying on the same plane. When attempting to find synonyms for noncoplanar, one could consider words like oblique, askew, or slanted. Oblique refers to something that is neither parallel nor perpendicular, while askew signifies something that is crooked or off-kilter. Slanted, on the other hand, implies a diagonal or inclined position or direction. Other synonyms for noncoplanar might include tilted, angled, skewed, or canted. Each of these terms indicates something that lies at an angle or a different level from something else, indicating noncoplanarity.