A crusading supporter can be referred to as a fierce advocate, champion, or defender. They may also be called an enthusiast, evangelist, or proponent. A crusading supporter is someone who is passionate about their cause and will go to great lengths to support it. They may be described as a zealot or a devoted follower. Other synonyms for a crusading supporter include a loyalist, supporter, or ally. These individuals may be highly motivated and eager to persuade others to join their cause, making them excellent advocates. Ultimately, a crusading supporter is someone who is committed to making a positive change, inspiring others to follow in their footsteps.