alter — If something alters or if you alter it, it changes.
correct — If something is correct, it is in accordance with the facts and has no mistakes.
amend — If you amend something that has been written such as a law, or something that is said, you change it in order to improve it or make it more accurate.
revise — to amend or alter: to revise one's opinion.
rewrite — to write in a different form or manner; revise: to rewrite the entire book.
edit — to supervise or direct the preparation of (a newspaper, magazine, book, etc.); serve as editor of; direct the editorial policies of.