The term 'ANGRY SOUND' can be described by three crossword solutions: GROWL (5 letters), BOO (3 letters), and GRR (3 letters). GROWL is a low, guttural sound made by an animal, usually a large one such as a bear or lion, to express anger or aggression. BOO is an exclamation used to express disapproval or contempt. It is often used in a theatrical context to express disapproval of a performer. GRR is an interjection used to express anger or frustration. It is often used as an onomatopoeia to represent the sound of an angry GROWL.