Synonyms of the word

attestor

• n. One who attests.

signatory

• n. One who signs or has signed something.
• adj. Relating to a seal; used in sealing.
• adj. Signing; joining or sharing in a signature.

signer

• n. One who signs something.
• n. One who uses sign language.

witness

• n. (uncountable) Attestation of a fact or event; testimony.
• n. (countable) One who sees or has personal knowledge of something.
• n. (countable) Someone called to give evidence in a court.
• n. (countable) Something that serves as evidence; a sign.
• v. (transitive) To furnish proof of, to show.
• v. (transitive) To take as evidence.
• v. (transitive) To see or gain knowledge of through experience.
• v. (intransitive, construed with to or for) To present personal religious testimony; to preach at (someone)…
• v. To see the execution of (a legal instrument), and subscribe it for the purpose of establishing its authenticity.