Synonyms for anonymous

unsigned, nameless, unknown, unacknowledged, uncredited, pseudonymous, unnamed, authorless, unavowed, unclaimed, unidentified, secret, with the name withheld, of unknown authorship, without a name, bearing no name, incognito, anon., faceless, undifferentiated, indistinguishable, nondescript.

Antonyms named*, signed, acknowledged.