The option Suggest keywords helps you to generate more keywords using one base keyword. Please proceed as follows:
Enter a base keyword in the corresponding field and press ENTER.
Choose the maximum number of results that you would like to have.
Click Generate Keywords.
To erase the generated keywords from the list you can choose to Clear All or uncheck individual items.
If you would like to use base keywords that you have used before, you can select them from the drop down list.
Click OK to add the selected keywords to your existing keyword list or Cancel to return to the original keyword list.