You can add a word to Word dictionary but you can never delete a .

[Jay Freedman]

See http://word.mvps.org/FAQs/General/ExcludeWordFromDic.htm.

 

[Suzanne S. Barnhill]

And in case you just want to remove a word you have mistakenly added to a
custom dictionary, you can easily do this by accessing the custom dictionary
through the Spelling & Grammar tab of Tools | Options. See
http://word.mvps.org/FAQs/General/EditCustomDic.htm