Other forms: enterprises; enterprising
Enterprise describes a readiness to act boldly to get something started, like the enterprise it takes to start a charity with only a dream and a few dollars.
Another meaning of enterprise is "a business venture," like a frozen yogurt enterprise. It requires a lot of determination, hard work and the steady belief that people will love your yogurt. People will say you show extraordinary enterprise for your willingness to take on such a challenging project, meaning you have initiative and drive.