What is another word for "accompaniment"?

Roget's Thesaurus (1911) lists these synonyms for "accompaniment": accession, accessory, accompany, accrue, add, addition, adjection, adjunct, advene, affix, along, and, annex, annexation, append, appendage, appurtenance, arm, associate, associated, association, attend, attendant, attribute, augment, bear, become, boat, body, bring, cheek, clap, coefficiency, coefficient, coexist, coexistence, colleague, collectively, comes, companion.