What is the difference between offsides and false start?

Answer 1

Offsides is if the defensive player jumps across the line of scrimmage while the ball is snapped. False start is when an offensive lineman jumps or moves his hand after he gets set.

Offsides = Defense

False Start = Offense

Answer 2

Well yes and no. It is the same penalty but a false start is the penalty on the offense while off sides is the penalty on the defense.