orthogonal vs extraneous

orthogonal and extraneous both are adjectives.

Word	Noun	Adjective	Verb	Adverb
orthogonal	No	Yes	No	No
extraneous	No	Yes	No	No

As adjectives, orthogonal and extraneous are synonyms defined as:

orthogonal and extraneous: not pertinent to the matter under consideration

Other synonyms of orthogonal include immaterial, impertinent.

orthogonal (adjective)	extraneous (adjective)
not pertinent to the matter under consideration	not belonging to that in which it is contained; introduced from an outside source
having a set of mutually perpendicular axes; meeting at right angles	not pertinent to the matter under consideration
statistically unrelated	coming from the outside
	not essential