Term lists can be renamed without disturbing their links to reference fields or the terms within them. Deleting or renaming term lists does not change the data entered into your references.
To delete or rename a term list:
From the Tools menu, select Define Term Lists (at least one library must be open to access this command).
The drop-down menu at the top of the Lists tab lets you choose from a list of open libraries. Select the library for which you would like to modify the term lists.
To Rename a Term List: Highlight a term list, and then click Rename List. In the Rename List dialog, enter the new name for the list, and click OK.
To Delete a Term List: Select a term list, and then click Delete List.
Click OK to save your changes.