All attest synonyms

verb attest

• affirm — If you affirm that something is true or that something exists, you state firmly and publicly that it is true or exists.
• authenticate — If you authenticate something, you state officially that it is genuine after examining it.
• corroborate — To corroborate something that has been said or reported means to provide evidence or information that supports it.
• substantiate — to establish by proof or competent evidence: to substantiate a charge.
• indicate — to be a sign of; betoken; evidence; show: His hesitation really indicates his doubt about the venture.
• swear — to make a solemn declaration or affirmation by some sacred being or object, as a deity or the Bible.
• verify — to prove the truth of, as by evidence or testimony; confirm; substantiate: Events verified his prediction.
• demonstrate — If you demonstrate a particular skill, quality, or feeling, you show by your actions that you have it.
• prove — to establish the truth or genuineness of, as by evidence or argument: to prove one's claim.
• uphold — to support or defend, as against opposition or criticism: He fought the duel to uphold his family's honor.
• show — to cause or allow to be seen; exhibit; display.
• ratify — to confirm by expressing consent, approval, or formal sanction: to ratify a constitutional amendment.
• support — to bear or hold up (a load, mass, structure, part, etc.); serve as a foundation for.
• certify — If someone in an official position certifies something, they officially state that it is true.
• countersign — If you countersign a document, you sign it after someone else has signed it.
• testify — to bear witness; give or afford evidence.
• display — to show or exhibit; make visible: to display a sign.
• assert — If someone asserts a fact or belief, they state it firmly.
• sustain — to support, hold, or bear up from below; bear the weight of, as a structure.
• confirm — If something confirms what you believe, suspect, or fear, it shows that it is definitely true.
• seal — a member of the U.S. Navy’s special operations forces.
• aver — If you aver that something is the case, you say very firmly that it is true.
• announce — If you announce something, you tell people about it publicly or officially.
• adjure — to command, often by exacting an oath; charge
• argue — If one person argues with another, they speak angrily to each other about something that they disagree about. You can also say that two people argue.
• warrant — authorization, sanction, or justification.
• declare — If you declare that something is true, you say that it is true in a firm, deliberate way. You can also declare an attitude or intention.
• witness — to see, hear, or know by personal presence and perception: to witness an accident.
• bear out — If someone or something bears a person out or bears out what that person is saying, they support what that person is saying.