Given a list of words, remove duplicate words and output the list with unique words.
Elephant, Elephant, Mouse, Cat, Rat, Rat
Elephant, Mouse, Cat, Rat
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Given a list of words, remove duplicate words and output the list with unique words.

### Response:
Elephant, Mouse, Cat, Rat