The term 'hammering sound' can be described by two crossword solutions: BANG (4 letters) and RATATAT (7 letters). BANG is a sharp, sudden sound that is usually made when something hard hits something else. It is often used to describe the sound of a hammer hitting a nail. RATATAT is a sound that is made when something is rapidly and repeatedly hit, such as a machine gun or a hammer hitting a nail. It is also used to describe the sound of a drum roll. Both words are commonly used to describe the sound of a hammer hitting a nail.