immaterial vs orthogonal

immaterial and orthogonal both are adjectives.

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

As adjectives, immaterial and orthogonal are synonyms defined as:

immaterial and orthogonal: not pertinent to the matter under consideration

Other synonyms of immaterial include extraneous, impertinent.

immaterial (adjective)	orthogonal (adjective)
not consisting of matter	not pertinent to the matter under consideration
of no importance or relevance especially to a law case	having a set of mutually perpendicular axes; meeting at right angles
without material form or substance	statistically unrelated
not pertinent to the matter under consideration
(often followed by `to') lacking importance; not mattering one way or the other