Pairing (noun)

1. The act of matching two things together.
2. The result of matching two things together.
3. The combination of two things, especially people or objects, used or considered together.
4. The act of joining two individuals together for a specific purpose or task.

Origin:

Late 16th century (as a verb in the sense "put into pairs"): from pair + -ing.

Examples:

1. The pairing of the wine with the cheese was a perfect match.
2. The pairing of the socks was done by color.
3. The pairing of the two musicians created a unique sound.
4. The pairing of the two detectives was a successful one.
5. The pairing of the two companies resulted in a new and innovative product.