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 open your word list.

2. Hover over a word, click the 3 dots, then choose Add to.

3. Select an existing list or click Create List to make a new one.

4. The word stays in the current list and is also added to the selected one.

Alternative: 

Click the word, then use the add icon to choose a list.