Can a bow get a non-bow enchantment?
Solution 1:
Short answer: No
Long answer: No, unless you have a mod.
Solution 2:
Yes. If you make an Enchanted Book you can add a non-bow enchantment. If you are in Creative mode, you can enchant a bow with any enchantment; if you are in Survival mode, however, you may only enchant it with Unbreaking.