SIMPLE TYPING TO MS WORDS (urgently)

I have a set of (Real Estate) Loan Documents (about 10 MS word docs). I want to create one Word or Excel Document where I enter things like the Borrower Name, Borrower address, loan amount, etc. and then have all that info merged into the appropriate form fields. In other words - I just want to enter the relevant info once and have it merged into all of the documents where each form field is located. I obviously want to set it up so that it can be used repeatedly. And the end product would need to remain as a Word document in case I need to amend other language in the docs (that are not form fields). Thanks