Is "ice point" the same as "freezing point"?
Ice point is the freezing point of water.

Freezing point is the point where liquid turns to solid.

The difference is that in the case of ice point is substance is always water. 

(Note that there is a slight discrepancy of 0.01 K between the triple point of water, melting point, freezing point and/or ice point. And technically, Ice point is the point where water and Ice are in equillibrium.)

See e.g. http://www.thefreedictionary.com/freezing+point, http://www.thefreedictionary.com/ice+point.