Of course there is. Selected stealth bombings of government positions. Arming the rebels with weapons that can effectively counter government forces. A no-fly zone is probably too risky, and probably not feasible with only stealth capable fighters, but we could certainly use naval based ordnance from the Sixth Fleet. Assad's infrastructure is primarily in Alawite majority areas and Damascus, both of which are close to the coast. Thankfully the President is moving in this direction. I fear it may be too late to prevent a government victory, but we'll see.