attestation vs attest

attestation is a noun but attest is not a noun.

Word	Noun	Adjective	Verb	Adverb
attestation	Yes	No	No	No
attest	No	No	Yes	No

attestation (noun)	attest (noun)
the action of bearing witness
the evidence by which something is attested

attestation (verb)	attest (verb)
	authenticate, affirm to be true, genuine, or correct, as in an official capacity
	provide evidence for; stand as proof of; show by one's behavior, attitude, or external attributes
	give testimony in a court of law
	establish or verify the usage of