Is there any way to to make a character pick randomly from a list of words?

So I'm doing a beginner project for a class I'm taking but I thought it would be cool if I could make a list of words that the character could randomly choose from when clicked. but can't seem to figure anything out. Anyone know how to make this work. If so, is there a way to add sound?
Thanks in advance

untitled script pic

the random option is in the dropdown menu