backpacking is going away from home (mostly overseas) with only your backpack and staying in cheap motels or hostels and working and doing odd jobs around the place for money.
hiking is an outdoor activity where you go for a long walk on walking routes or up mountains to go see the views, you can take bags.. you would probably want to because you need food and water.
Well, hiking is more like walking in the woods whereas backpacking is traveling on foot (or hitchhiking) for long distances and living out of a backpack.
Backpacking usually alludes,to the idea that you will be staying overnight @ least,because you will have sleeping & cooking gear with
you.Hiking means your usually back @ base before dark..
A bit simplified but you get the idea i trust?
Hey have fun on your adventure,best of luck..