Which term is used for the act of speeding up a process?

The term that refers to the act of speeding up a process is "accelerate." In scientific terms, acceleration is a change in the velocity of an object, which can refer to increasing speed in various contexts, such as physical motion or the progression of a process in chemistry or other fields.

In many instances, acceleration implies an increase in the rate of occurrence or change, which aligns directly with the idea of speeding something up. This concept can be applied to different scenarios, including increasing reaction rates in chemical processes or boosting growth rates in biological contexts.

While terms like "decelerate" indicate a reduction in speed and "modulate" refers to adjusting or varying a process, "enhance" generally means to improve the quality or effectiveness of something but does not necessarily imply speeding it up specifically. Therefore, "accelerate" is the most appropriate term when describing the action of increasing the speed of a process.