Quack

charlatão

(charlatan)

curandeiro

(doctor)

mata-sanos

(fraudulent or incompetent doctor of medicine)

quac

(sound made by a duck)

quá

(sound made by a duck)

qué

(sound made by a duck)

quém

(sound made by a duck)

gracitar

(to make a noise like a duck)

grasnar

(to make a noise like a duck)

grasnir

(to make a noise like a duck)

grassitar

(to make a noise like a duck)