The term 'brushing sound' can be described by two crossword solutions: SWISH (5 letters) and SWOOSH (6 letters). SWISH is a light, gentle sound that is made when something moves quickly through the air or when an object brushes against something else. SWOOSH is a louder, more intense sound that is made when something moves quickly through the air or when an object brushes against something else. Both words are used to describe the sound of something brushing against something else.