unstained vs unvarnished

unstained and unvarnished both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unstained	No	Yes	No	No
unvarnished	No	Yes	No	No

As adjectives, unstained and unvarnished are synonyms defined as:

unstained (adjective)	unvarnished (adjective)
not stained	free from any effort to soften to disguise
without soil or spot or stain	not having a coating of stain or varnish
(of reputation) free from blemishes
not having a coating of stain or varnish