A special case is a situation that is unique and requires special attention. The term can be broken down into four words: ETUI (4 letters), EXCEPTION (9 letters), QUIRK (5 letters), and PECULIARITY (11 letters). ETUI refers to a small case or container, usually for carrying personal items. An EXCEPTION is an instance that does not conform to the general rule. A QUIRK is an odd or peculiar behavior or habit. Lastly, PECULIARITY is an unusual or strange quality. Together, these words describe a situation that is out of the ordinary and requires special consideration.