attestor vs attestator

attestor and attestator both are nouns.

Word	Noun	Adjective	Verb	Adverb
attestor	Yes	No	No	No
attestator	Yes	No	No	No

As nouns, attestor and attestator are synonyms defined as:

attestor and attestator: (law) a person who attests to the genuineness of a document or signature by adding their own signature

Other synonyms of attestor include attestant, witness.

attestor (noun)	attestator (noun)
(law) a person who attests to the genuineness of a document or signature by adding their own signature	(law) a person who attests to the genuineness of a document or signature by adding their own signature