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Wiktionary
acas

n. 1 (context aviation English) Airborne Collision Avoidance System 2 (context British English) Advisory, Conciliation and Arbitration Service

Wikipedia
Acâș

Acâş (, Hungarian pronunciation: ; ) is a rural municipality of 2,792 inhabitants situated in Satu Mare County, Romania. It is composed of four villages: Acâş, Ganaş (Gánás), Mihăieni (Krasznamihályfalva) and Unimăt (Újnémet).