irrelevant 10 Associations

digressive (similar term) tangential (similar term) extraneous (similar term) immaterial (similar term) impertinent (similar term) orthogonal (similar term) inapplicable (similar term)

perpendicular 13 Associations

normal (similar term) orthogonal (similar term) rectangular (similar term) right (similar term) oblique (antonym) parallel (antonym)

unrelated 9 Associations

misrelated (similar term) orthogonal (similar term) uncorrelated (similar term) related (antonym)