- n1. testifying, witnessing, evidencing, declaration, testification, Law. exemplification; documentation, circumstantiation, demonstration, corroboration, substantiation; certification, confirmation, verification, validation, establishment, authentication; endorsement, vouching, recommendation; assurance, asseveration, averment, avouchment, affirmation.2. testimony, evidence, information, witness, sworn statement, statement, document, Law. affidavit, Law. deposition; certificate, warrant, Law. acknowledgment; guarantee, guaranty, warranty, testimonial, Obs. vouch; promise, pledge, plight, oath, word
A Note on the Style of the synonym finder. 2014.