They are different products for different purposes. Unless you define the scope of the question, it makes no sense. Excel can automatically calculate square roots and word can not.
You can view your document as it will be printed without wasting paper or ink. It is environmentally responsible and makes it quicker for you to see if you need to make any changes before sending or...
Word processors can save data while a typewriter can't. You can edit while you work on a word processor, but with a typewriter you have to start over. Correcting was also a awful chore with a...