additional, a. supplemental, adscititious, supplementary.
addle, v. [muddle], [confuse]; [spoil], [rot].
address, n. [discourse], [speech], [lecture], [oration], allocution; [direction], superscription, [delivery]. Associated word: vocative.
address, v. [accost], speak to; [direct], superscribe.
adept, n. See expert.
adequacy, n. [sufficiency]. Antonyms: inadequacy, [insufficiency].
adequate, a. [sufficient], commensurate, [equal], proportionate. Antonyms: [inadequate], [insufficient].
adjacent, a. [adjoining], contiguous.
adjoining, a. contiguous, [adjacent], [neighboring].
adjustment, n. [adaptation], regulation, [settlement].