What is another word for "accessory"?

Roget's Thesaurus (1911) lists these synonyms for "accessory": abettor, above, accompaniment, accompany, accomplice, addition, additional, additive, adherent, adjectitious, adjunct, adjutant, adjuvant, adscititious, adviser, advocate, after, ally, alone, along, also, alter, and, angel, appendage, appurtenance, arm, ascititious, assistant, associate, associated, association, attend, attendant, attorney, attribute, auxiliary, backer, banco, bar.