checker / chekker [ˈtʃɛkɜr]
checker – n. – 1. a person or thing that verifies or examines (as in fact checker for publishers); 2. (esp. U.S.) a cashier in a supermarket or store; 3. (Hockey) a forward whose role is primarily defensive
chekker – n – a stringed keyboard instrument of the 14th & 15th centuries