Synonyms of orthogonal

1. extraneous, immaterial, impertinent, orthogonal, irrelevant (vs. relevant): usage: not pertinent to the matter under consideration; "an issue extraneous to the debate"; "the price was immaterial"; "mentioned several impertinent facts before finally coming to the point"
2. orthogonal, unrelated (vs. related): usage: statistically unrelated
3. orthogonal, rectangular, perpendicular (vs. oblique) (vs. parallel): usage: having a set of mutually perpendicular axes; meeting at right angles; "wind and sea may displace the ship's center of gravity along three orthogonal axes"; "a rectangular Cartesian coordinate system"