Crash sound is a term used to describe the sound of an object hitting another object or surface. The most common crash sound words are THUD, BAM, WHAM, and PAD. THUD is a low-pitched sound that is made when something heavy hits a surface. BAM is a loud sound that is made when something hard hits a surface. WHAM is a loud sound that is made when something heavy hits a surface with force. PAD is a soft sound that is made when something light hits a surface.