How do I edit or delete multiple words?

On the Mac

You can select multiple words by holding down the cmd-key on your keyboard while clicking on words. You can select a range of words by holding down the shift-key and clicking on the first and last word of the range.
You can then edit or delete the words just as you would with a single word.

On iPhone or iPad

To select multiple words tap on the list icon on the top left corner of the vocabulary list view. When you have selected all the words you want to edit or delete, tap the edit button on the top right corner.
You can then edit or delete the words just as you would with a single word.