The term 'HOG SOUND' can be broken down into three crossword solutions: SNORT (5 letters), GRUNT (5 letters), and OINK (4 letters). These are all sounds that a hog might make. Snorting is a loud, sharp sound made by quickly exhaling air through the nose, while grunting is a low, guttural sound made by expelling air from the mouth. Oinking is a short, high-pitched sound made by hogs when they are content or excited.