If the red and green squiggly underlines that indicate grammatical and spelling errors annoy you, you can turn off automatic spelling and grammar checking.
Click Tools.
Click Options.
The Options dialog box appears.
Click the Spelling & Grammar tab.
Deselect the Check spelling as you type option ( changes to ) to disable automatic spell checking.
Deselect the Check grammar as you type option ( changes to ) to disable automatic grammar checking.
Click OK.
Word no longer identifies the spelling and grammar errors in your document.
If I disable automatic spelling and grammar checking, is there a way to check spelling and grammar?
Yes. Use the procedure described in the section “Check Spelling and Grammar.” When you follow the procedure in the section “Disable Grammar and Spell Checking,” you are disabling only the portion of the feature where Word automatically identifies misspellings or grammar mistakes with squiggly red or green underlines.
What should I do if I change my mind and decide that I want to see the red and green squiggly lines?
Repeat the steps in this section, selecting the boxes you deselected previously ( changes to ).