What are 3 criteria for acceleration?

I don't think you mean 'criteria'. I think you mean three occurrences or

observations that indicate the presence of acceleration.

They are:

- - an object is speeding up

- - an object is slowing down

- - the direction of an object's motion is changing.

Any one of these changes is acceleration.

There's a single term that covers them all. It is "change in velocity".