The crossword solution for the term TAILS, E.G. is CALL, which is a four-letter word. The term 'TAILS' is often used to refer to the reverse side of a coin, and the verb 'CALL' is used to describe the act of determining which side of a coin is facing up after it has been flipped. Therefore, the term 'CALL' can be used to refer to the act of determining which side of a coin is facing up after it has been flipped, such as when playing a game of chance that involves flipping a coin.