Yes, couple is a Scrabble word!

Verb

1. Bring two objects, ideas, or people together

2. Link together

3. Form a pair or pairs

4. Engage in sexual intercourse

Noun

1. A pair who associate with one another

2. A pair of people who live together

3. A small indefinite number

4. Two items of the same kind

5. (physics) something joined by two equal and opposite forces that act along parallel lines