What's the root or base word of rebellious, belligerent, doctrine, document, levity, levitate, initiative, itinerary, impulsive, and compel??? Please help thanks!!!

Answer 1

The root word for rebellious is rebel.

The root word for belligerent is a Latin word:
http://www.google.com/#q=root+word+belligerent,+&*

You can look the other words up the same way.

Answer 2

Here's another website where you can find this type of information:

http://www.etymonline.com