To remove a dictionary
The Installed Dictionary list
in the Spelling panel of the Options dialog box shows the dictionaries
currently available for spell checking a form. You can delete one or
more of the custom dictionaries you no longer need. When you delete
a custom dictionary, it is removed from the list of installed dictionaries.
The actual dictionary file (*.clam) is not removed from your computer’s
You cannot remove My Custom Dictionary because
Designer always refers to this dictionary whenever you spell check
Select Tools > Options.
In the Spelling panel, select the dictionary you want to
delete from the Installed Dictionaries list.
Click Remove a Dictionary.