Open English Wordnet
Nouns
(n)endorsement, indorsement, blurba promotional statement (as found on the dust jackets of books)“the author got all his friends to write blurbs for his book”
(n)sanction, countenance, endorsement, indorsement, warrant, imprimaturformal and explicit approval“a Democrat usually gets the union's endorsement”
(n)endorsement, indorsementa signature that validates something“the cashier would not cash the check without an endorsement”
(n)endorsement, indorsementthe act of endorsing“a star athlete can make a lot of money from endorsements”