Courage and Bravery wouldn't be the opposite of fear, as most everyone that's being "brave" or "couragous" is scared shitliess. :-) Courage is fear in action.
And though I may not know what the opposite of fear is--I DO know what it's closest relative is...
Anger.
So, if you're ever in a situation where you're scared out of your mind, get pissed instead!! It'll help with your fight/flight response.
Huggs!!!
Lady Sharlot :-)