Defog clears your enemy's entry hazards (along with Light Screen etc.), but is Rapid Spin the only move that clears your own entry hazards?
I know a non-flying/ levitating Poison type will absorb Poison Spikes, but is that it?
No, there isn't.
However, the ability Magic Bounce prevents opponents from setting up hazards on your side.
Similarly, Magic Coat (move) prevents hazards also.