What is a collective noun for match?

There isn't a specific, commonly used collective noun for "match" in the sense of a game or competition.

Here are some options depending on the context:

For a set of matches:

* Box (of matches)

* Pack (of matches)

* Bundle (of matches)

For a group of matches in a tournament:

* Round (of matches)

* Series (of matches)

* Tournament (of matches)

For a group of matches within a sport:

* Season (of matches)

* Schedule (of matches)

Figurative:

* Clash (of titans) - can be used for a group of matches between highly competitive teams.

Ultimately, the best option will depend on the specific context. You can also use phrases like "a series of matches" or "a collection of matches" to be more specific.