Fight for a cause is an expression that refers to taking action in support of a particular cause or issue. It can involve anything from peaceful protests and demonstrations to more extreme forms of activism such as civil disobedience. The term CRUSADE, which has seven letters, is often used interchangeably with fight for a cause. A CRUSADE is a long and determined effort to achieve a goal, usually involving a large number of people. It is often associated with religious or moral causes, but it can also refer to any kind of campaign for a cause.