argumentative, a. ratiocinative; [disputatious], polemical, [controversial], dialectical.
arid, a. [dry], [barren], [unproductive], parched, [sterile]; uninteresting, [dull], unsuggestive.
aridity, n. [dryness], [drought], unproductiveness, [sterility]; dullness, unsuggestiveness.
arise, v. [mount], ascend, [rise]; proceed, [issue], [spring], originate.
aristocracy, n. peerage, patriciate, [nobility], patrician [order]. Antonyms: [commonalty], yeomanry, proletariate, bourgeoisie, peasantry, [rabble].
aristrocrat, n. patrician, [noble], [peer], grandee, [lord].
aristocratic, a. patrician, [noble], titled. Antonyms: plebeian, proletarian.
arm, n. brachium (upper arm), antibrachium ([forearm]); (bones of the arm) humerus, radius, ulna, epipodiale. Associated words: akimbo, solen, [cradle], triceps, chevron, brassard, [pinion], discriminal, gesticulate, gesticulation, [gesture], brachial, chelidon, elbow, biceps.
arm, n. [branch]; inlet (of the sea), fiord, firth, frith, [cove], estuary; projection.
arm, v. equip (with weapons), fortify, [strengthen].