Janus, ambiguity, ambivalence, bedizenment, biformity, bifurcation, burlesque, clone, conjugation, copy, counterpart, dichotomy, ditto, double, doubleness, doublethink, doubling, dualism, duality, dummy, dupe, duplexity, duplicate, duplication of effort, duplicity, echo, embellishment, equivocality, expletive, extravagance, facsimile, fat, featherbedding, filling, frill, frills, frippery, gingerbread, halving, hectography, imitation, irony, knockoff, luxury, mimeography, mock-up, model, needlessness, ornamentation, overadornment, overlap, padding, pairing, palingenesis, paraphrase, parody, payroll padding, plagiarism, pleonasm, polarity, prolixity, quadruplicate, quotation, re-creation, re-formation, reappearance, rebirth, rebuilding, reconstitution, reconstruction, recurrence, redesign, redoing, redoubling, redundance, redundancy, reduplication, reecho, reedition, reestablishment, refashioning, regeneration, regenesis, regurgitation, reincarnation, reinstitution, reissue, remaking, renascence, renewal, renovation, reoccurrence, reorganization, repetition, replica, replication, representation, reprinting, reproduction, reprography, reshaping, restoration, restructuring, resumption, resurrection, return, revision, revival, rubbing, superfluity, superfluousness, tautology, tracing, transcription, travesty, triplicate, twinning, two-facedness, twoness, unnecessariness, verbosity, version, xerography