How do I add a specific word to another Word List?

How do I add a specific word to another Word List?

1. Go to your Words section and click on your word list.

2. Hover over a word and click the three dots.

3. Select Add to, then choose an existing list or click Create List to make a new one.

4. The word will stay in its current list and also be added to the list you selected or created.

Alternative: 

You can also click on the word itself, then click the Add icon.