appraiser vs authenticator

appraiser and authenticator both are nouns.

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

As nouns, appraiser and authenticator are synonyms defined as:

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

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