quack

That doctor’s a quack!

The duck quacked loudly by the pond.

The quack doctor gave him some herbal medicine.

She could tell the difference between a quack and a real doctor.

The quack remedy did nothing to cure his illness.

The duck quack echoed across the lake.

He dismissed the medical advice as quackery.

The quack claimed his potion could cure any ailment.

The quackery of the self-proclaimed healer was exposed.

The quack of the duck could be heard from afar.

She fell for the quack's promises of a miracle cure.