Synonyms of countersign

Noun

1. password, watchword, word, parole, countersign, positive identification, secret, arcanum

usage: a secret word or phrase known only to a restricted group; "he forgot the password"

2. countersignature, countersign, signature

usage: a second confirming signature endorsing a document already signed

Verb

1. countersign, sign

usage: add one's signature to after another's to attest authenticity; "You must countersign on this line of the contract"

Definition and meaning of countersign (Dictionary)