arb vs arbitrageur

arb and arbitrageur both are nouns.

Word	Noun	Adjective	Verb	Adverb
arb	Yes	No	No	No
arbitrageur	Yes	No	No	No

As nouns, arb and arbitrageur are synonyms defined as:

arb and arbitrageur: 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)

Other synonyms of arb include arbitrager.

arb (noun)	arbitrageur (noun)
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)	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)