Aesopian language, Babel, affiliate, argot, associate, babble, belonger, brother, cant, card-carrier, card-carrying member, cardholder, charter member, cipher, clubber, clubman, clubwoman, code, committeeman, comrade, conventioneer, conventioner, conventionist, cryptogram, double Dutch, drivel, dues-paying member, enlistee, enrollee, fellow, fraternity man, garble, gibberish, gift of tongues, glossolalia, gobbledygook, guildsman, honorary member, initiate, insider, jabber, jabberwocky, jargon, joiner, jumble, life member, member, noise, nonsense, one of us, pledge, scramble, secret language, sister, skimble-skamble, slang, socius, sorority girl, sorority woman