A damper is a device used to control the flow of air in a system, such as a furnace or air conditioning unit. The crossword solutions for the term 'damper' are 'HINDRANCE' (9 letters), 'CHECK' (5 letters), 'wetter' (6 letters), 'SILENCER' (8 letters), and 'moister' (7 letters). A HINDRANCE is an obstacle that prevents progress, while a CHECK is a restraint or limitation. Wetter and moister both refer to increased moisture levels, and a SILENCER is a device used to reduce noise. All of these terms can be used to describe the function of a damper.