Synonyms and related words :
abominable, anonymous, cryptonymic, cryptonymous, horrible, ignotus, incognito, indefinable, indescribable, ineffable, inexpressible, inglorious, innominate, little known, no credit to, obscure, renownless, repulsive, unacknowledged, uncelebrated, undefined, undesignated, undistinguished, unfamed, unglorified, unheard-of, unhonored, unidentified, unknown, unmentionable, unnamed, unnotable, unnoted, unnoticed, unpopular, unremarked, unrenowned, unspeakable, unspecified, unsung, unutterable, without a name