matchmaking

1. An attempt to make two people romantically interested in each other, especially an attempt to set up a date between people or to arrange a marriage. (countable, uncountable)
2. A service aiming to bring together sellers and buyers or potential partners. (countable, uncountable)
3. The act or process of locating suitable players to take part in a multiplayer game session. (countable, uncountable)
4. The manufacture of matches for kindling or burning. (countable, uncountable)

Plural matchmakings