What is another word for "addition"?

Roget's Thesaurus (1911) lists these synonyms for "addition": above, accession, accessory, accompaniment, accompany, accrue, add, additional, additive, adjection, adjectitious, adjunct, adscititious, advene, affix, alone, along, also, and, annex, annexation, append, appendage, appurtenance, arm, ascititious, associate, associated, association, attend, attendant, attribute, augment, bargain, bear, become, besides, boat, body, boot.