| Additional 1. (a.) Added; supplemental; in the way of an addition. 2. (n.) Something added. Thesaurus Entries accessory, accidental, accumulative, added, additive, additory, adscititious, adventitious, ancillary, another, appurtenant, ascititious, auxiliary, casual, circumstantial, collateral, contingent, contributory, cumulative, else, extra, farther, fortuitous, fresh, further, incidental, inessential, more, new, nonessential, other, plus, renewed, secondary, spare, subsidiary, summational, summative, superadded, superfluous, supernumerary, supervenient, supplemental, supplementary, surplus, ulterior, unessential |