endorsement Synonyms

blurb warrant secondment countenance second imprimatur indorsement sanction substantiation sufferance superscription supporting support tailstock subscription smiler signet ratification reaffirmation reassertion recognition recommendation reference sanctification sigil signature testimonial validation arcsecond good word credentials sec legalisation stamp of approval mho nihil obstat green light thumbs up blank check rubber stamp visa ad seal of approval backup verification say-so authentication clean bill of health authorisation empowerment