* Simultaneous: Happening at the same time.
* Simulate: To imitate or reproduce the appearance or effect of something.
* Simulation: The act of imitating or reproducing the appearance or effect of something.
* Simultaneity: The state or quality of happening at the same time.
* Simulcast: A broadcast that is transmitted at the same time on multiple channels.
* Simultan: An obsolete word meaning a simultaneous event.
Let me know if you'd like more examples or explanation!