The venerable Harvard Business School has created an online Elevator Pitch Builder. It comes complete with buzz words you can select and everything.
The thing is utterly worthless.
Folks, it's about being compelling. Yes, some of the power words help with that, but your STORY is more important still.
What can you do for your prospects that you can say in just 30 seconds or so that will drive sufficient curiosity that they will want to know more?