appraiser vs valuator

appraiser and valuator both are nouns.

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

As nouns, appraiser and valuator are synonyms defined as:

appraiser and valuator: one who estimates officially the worth or value or quality of things

appraiser (noun)	valuator (noun)
one who estimates officially the worth or value or quality of things	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