1) a strong desire to be successful (ambition)

2) the feeling that something exists or is true, that a person is honest, will be successful etc (belief)

3) using fast (and often severe) methods to be successful (crash)

4) a plan, idea etc that cannot happen or be successful (pipedream)

5) holding tightly; very determined to get or keep something, be successful in winning an argument etc (tenacious)