What is the name of word people say when they something at same time?

There isn't one single, universally accepted word for when people say something at the same time. However, here are some options you can use depending on the context:

Formal:

* Simultaneously: This emphasizes that both actions happen at the exact same time.

* Concurrently: This implies that the actions happen at the same time, but may not be perfectly synchronized.

Informal:

* At the same time: This is the most straightforward way to describe the situation.

* At once: This implies a sudden and rapid occurrence.

* In unison: This is used when people are saying the same thing, often in a coordinated way (like a chorus).

* Speaking over each other: This describes the situation where two or more people are trying to talk at the same time and interrupting each other.

* Talking over one another: This is similar to "speaking over each other," but emphasizes the interruption aspect.

Humorous:

* A verbal collision: This describes the situation as if two objects have collided, creating a humorous image.

The best word to use depends on the specific situation and the desired tone.