"Mouthwash" Natural Recordings by Native Speakers
Mouthwash is a liquid solution that people swill around their mouth to clean and freshen it, often used to remove bacteria and food particles from between the teeth and along the gumline.
A mouthful is an informal expression used to describe something that is complex, verbose, or difficult to understand. It can also refer to a large or excessive amount of something, particularly food or saliva. For example: "The professor's response was a mouthful, I had trouble following what he was saying." or "He took a mouthful of water and then began to speak."
The noun "mouths" refers to the openings at the end of a throat through which an animal, including humans, takes in food and expels speech, odors, and other substances. It can also refer to the openings of rivers, inlets, or other bodies of water that empty into a larger body of water. Additionally, "mouths" can be used to refer to the request for something, especially money or a bribe, as in "he made a bid for public service and mouthed the official's favors".