Auto Index - automatically output all indices within the array..
Index - manually output an index within the array (uncheck Auto Index to enable).
Add - use this button to add more rows (indices) to the array.
0: String - the first index in the array.
Start with a Text Shape in a Duplicator.
Create 3 indices (Add button) and enter some text for each index.
Connect stringArray.id > textShape.text.
Connect a Random node to the Array Index of the String Array.
Set Min and Max on Random to 0 and 2
Each duplicated Text Shape will be randomly set one of the three words you entered for each index.