untainted vs untarnished

untainted and untarnished both are adjectives.

Word	Noun	Adjective	Verb	Adverb
untainted	No	Yes	No	No
untarnished	No	Yes	No	No

As adjectives, untainted and untarnished are synonyms defined as:

Other synonyms of untainted include stainless, unstained, unsullied.

untainted (adjective)	untarnished (adjective)
(of reputation) free from blemishes	(of reputation) free from blemishes