Gridlock Sounds is a term used to describe the sound of honking horns that can be heard in a traffic jam. It is the sound of many cars honking their horns in unison, creating a cacophony of noise. The term 'gridlock sounds' comes from the idea that the traffic jam is so severe that it creates a gridlock, or a complete blockage of the road. HONKS, which is a five-letter word, is the sound made by a car horn.