How to use spell check in Microsoft Word to eliminate typos and grammatical errors

You can spell check in Microsoft Word by using its built-in spelling and grammar checker. If enabled, it will automatically underline errors.
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Enabling Spell Check in Word Office 365 on Windows 8

When you misspell a word in Microsoft's Office 365 Web Apps, the app relies entirely on your browser's spell check feature to correct it. On a computer running the Windows 8 operating system, however, ...