The term 'Loud Sleeper' is often used to describe someone who snores loudly while they sleep. Snoring is a common problem that affects many people, and it can be caused by a variety of factors such as allergies, sinus problems, or even the shape of the person's mouth or throat. Snorers can be disruptive to those around them, and in extreme cases, can even cause sleep deprivation. The 6-letter crossword solution for this term is 'SNORER'.