Quacker is a term used to describe a duck's vocalization, but there are many other words that can be used to describe this sound as well. Some common synonyms for quacker include honk, squawk, cackle, and croak. Honk is often used to describe the loud, deep sounds made by geese, while squawk might be used to describe the shorter, louder sounds made by parrots. Cackle is a term typically associated with the high-pitched laughter-like noises made by chickens. Finally, croak could be used to describe a hoarse or throaty sound made by a bird. When it comes to describing the sound of ducks, using multiple synonyms can add variety and depth to your writing, painting a more accurate and vivid picture for readers.