Synonyms of endorser

2 Syllables
signer, champions, staker, witness, backer, backers, signers
3 Syllables
registrar, espouser, recorder, subscribers, certifiers, scrivener, supporters, subscriber, promoter, notary, recorders, certifier, promoters
4 Syllables
signatory, apologist, advertiser, advertisers, undersigned, signatories