The term 'HOUND SOUND' is composed of six crossword solutions: BARK (4 letters), YIP (3 letters), BAY (3 letters), ARF (3 letters), YELP (4 letters), and WOOF (4 letters). These are all sounds that hounds make, with BARK being the most common. YIP is a high-pitched sound, while BAY is a deep, prolonged sound. ARF is a short, sharp BARK, YELP is a short, high-pitched sound, WOOF is a low, deep sound, and GRR is a growling sound. All of these sounds are used by hounds to communicate with other animals or humans.