A family of Microsoft word processing software products for creating web, email, and print documents.
With recent versions of Word, just clicking inside a marked spelling error should produce a list of suggestions.
If you are saying that you don't even see the underlines which indicate spelling errors, select all the text in the document (Ctrl+A), and then re-apply the correct language via the Language dialog box (Review tab > Language group > Language > Set Proofing Language). In the dialog box, also ensure that you clear the option "Do not check spelling or grammar."
For more, see Suzanne S. Barnhill's article at http://wordfaqs.ssbarnhill.com/MasterSpellCheck.htm .