Synonyms for arb Found 2 synonyms across 1 meaning for “arb”. 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) (noun) arbitrageurarbitrager Explore Related Words Rhymes with arbSynonyms for arbitrageurSynonyms for arbitrager Synonym Finder | Rhyme Finder | Poetry Editor