immaterial vs impertinent

immaterial and impertinent both are adjectives.

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

As adjectives, immaterial and impertinent are synonyms defined as:

immaterial and impertinent: not pertinent to the matter under consideration

Other synonyms of immaterial include extraneous, orthogonal.

immaterial (adjective)	impertinent (adjective)
not consisting of matter	improperly forward or bold
of no importance or relevance especially to a law case	not pertinent to the matter under consideration
without material form or substance	characterized by a lightly pert and exuberant quality
not pertinent to the matter under consideration
(often followed by `to') lacking importance; not mattering one way or the other