See confirm in American Heritage Dictionary 4 Synonyms
confirm corroborate substantiate authenticate validate verify
These verbs mean to affirm the truth, accuracy, or genuineness of something. Confirm implies removal of all doubt: “We must never make experiments to confirm our ideas, but simply to control them” (Claude Bernard).
Corroborate refers to supporting something by means of strengthening evidence: The witness is expected to corroborate the plaintiff's testimony.
To substantiate is to establish by presenting substantial or tangible evidence: “one of the most fully substantiated of historical facts” (James Harvey Robinson).
Authenticate implies the establishment of genuineness of something by the testimony of an expert: Never purchase an antique before it has been authenticated.
Validate refers to establishing the validity of something, such as a theory, claim, or judgment: The divorce validated my parents' original objection to the marriage.
Verify implies proving by comparison with an original or with established fact: The bank refused to cash the check until the signature was verified.
See confirm in Webster's New World Roget's A-Z Thesaurus II
verb
To assure the certainty or validity of:
attest, authenticate, back (up), bear out, corroborate, evidence, justify, substantiate, testify (to), validate, verify, warrant. See support, trueTo establish as true or genuine:
authenticate, bear out, corroborate, demonstrate, endorse, establish, evidence, prove, show, substantiate, validate, verify. See show, supportTo make firmer in a particular conviction or habit:
fortify, harden, strengthen. See strongTo accept officially:
adopt, affirm, approve, pass, ratify, sanction. See accept, law
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