What is the collective noun for competition?

There isn't a widely accepted or commonly used collective noun specifically for "competition."

Here's why:

* Competition is a concept, not a group of individuals. We don't typically think of competitions as a unified entity the way we might think of a "flock of birds" or a "herd of elephants."

* The word itself is already plural. "Competition" is inherently about multiple entities vying against each other.

However, you could use some descriptive phrases to convey the idea of a group of competitions:

* A series of competitions

* A cycle of tournaments

* A roster of events

* A field of contenders

The best phrase will depend on the specific context.