Breadcrumb Home > Thesaurus > A Synonyms of arb Find synonyms for: Noun1. arbitrageur, arbitrager, arb, businessman, man of affairsusage: someone who engages in arbitrage (who purchases securities in one market for immediate resale in another in the hope of profiting from the price differential)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of arb (Dictionary) ✖ Related Content Daily Word Quiz: tautology Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language