Synonyms: unidentified, unknown, unnamed, nameless
Definition: being or having an unknown or unnamed source
Usage: a poem by an unknown author; corporations responsible to nameless owners; an unnamed donor
Similar words: anon., anonymous
Definition: having no known name or identity or known source
Usage: anonymous authors; anonymous donors; an anonymous gift
Synonyms: unidentified
Definition: not yet identified
Usage: an unidentified species; an unidentified witness
Similar words: unknown
Definition: not known
Usage: an unknown amount; an unknown island; an unknown writer; an unknown source