validate Synonyms

corroborate formalise formalize undergird sustain support substantiate signed sign show sanction reconfirm recognize ratify prove uphold rubber stamp verify notarize legitimise legitimatise decriminalize authorise double-check bear out back up witness warranting warrant vindicate verified permit pass confirm circumstantiate check certify bless back authorize authenticate attest approve allow affirm accredit corroborated corroborating license legitimize