Synonyms of endorsing

1 Syllable
push, bless, boost, back
2 Syllables
champion, commend, defend, witness, warrant, confirm, affirm, okay, second, favor, uphold, sustain, attest, praise, sanction
3 Syllables
agreement, guarantee, rubber-stamp, ratify, certify, accredit, approve, recommend
4 Syllables
advocate, underwrite, countenance
5 Syllables
affirmatory, confirmative, affirmative, authenticate