There are several options for disabling spellchecking (some of these are document-specific and others are installation-specific; see
http://wordfaqs.mvps.org/MasterSpellCheck.htm).
However, if you want to suppress hyphenation, you must apply "Do not check spelling or grammar" formatting to the text in the document. You can apply this as a style or to the selected text via Review tab | Set Language.