impertinent vs extraneous

impertinent and extraneous both are adjectives.

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

As adjectives, impertinent and extraneous are synonyms defined as:

impertinent and extraneous: not pertinent to the matter under consideration

Other synonyms of impertinent include immaterial, orthogonal.

impertinent (adjective)	extraneous (adjective)
improperly forward or bold	not belonging to that in which it is contained; introduced from an outside source
not pertinent to the matter under consideration	not pertinent to the matter under consideration
characterized by a lightly pert and exuberant quality	coming from the outside
	not essential