all_word_list.extend()

As an AI language model, I can provide information on the function "extend()" in Python.

The "extend()" function is a built-in method in Python that adds all the elements of an iterable (list, tuple, set, dictionary) to the end of an existing list. This function modifies the original list and returns None.

Here is an example:

fruits = ['apple', 'banana', 'orange']
more_fruits = ['grape', 'pineapple', 'kiwi']

fruits.extend(more_fruits)

print(fruits)

Output:

['apple', 'banana', 'orange', 'grape', 'pineapple', 'kiwi']

In this example, the "extend()" function adds all the elements of the "more_fruits" list to the end of the "fruits" list. The final output shows the updated "fruits" list.