A chimney is a vertical structure that allows smoke and other gases to escape from a building. The term 'chimney' can refer to the entire structure, or just the part that extends above the roof. The 10-letter solution, 'SMOKESTACK, ' is another word for chimney, referring to the part of the structure that rises above the roof. The 6-letter solution, 'OUTLET, ' is another word for the opening at the top of the chimney where the smoke and gases escape. The 4-letter solution, 'VENT, ' is a synonym for OUTLET. The 5-letter solution, 'STACK, ' is another word for chimney. The 6-letter solution, 'FUNNEL, ' is a type of chimney that is wider at the bottom and narrower at the top. The 4-letter solution, 'FLUE, ' is the interior lining of a chimney. The 4-letter solution, 'Etna, ' is a reference to Mount Etna, an active volcano in Sicily, Italy. The 5-letter solution, 'SWEEP, ' is a person who cleans chimneys. The 4-letter solution, 'SOOT, ' is a black powdery substance that accumulates in chimneys. The 3-letter solution, 'lum, ' is a Scottish word for chimney.