authenticator vs appraiser

authenticator and appraiser both are nouns.

Word	Noun	Adjective	Verb	Adverb
authenticator	Yes	No	No	No
appraiser	Yes	No	No	No

As nouns, authenticator and appraiser are synonyms defined as:

authenticator and appraiser: one who determines authenticity (as of works of art) or who guarantees validity

authenticator (noun)	appraiser (noun)
one who determines authenticity (as of works of art) or who guarantees validity	one who estimates officially the worth or value or quality of things
	one who determines authenticity (as of works of art) or who guarantees validity