Bugaboo is a seven-letter term that can be used to describe a cause of fear. It is derived from the Scottish word 'bugabo', which means 'BOGEYMAN' or 'scarecrow'. BUGABOO is often used to refer to an object or situation that causes fear or anxiety. It can also be used to describe a person who is seen as a source of fear or worry. In modern usage, BUGABOO is often used to describe a problem or issue that is difficult to solve or overcome.