Here's why:
* Abstract nouns refer to concepts, ideas, qualities, or states of being that cannot be physically touched or seen.
* Process refers to a series of actions or steps taken to achieve a particular end. It's a concept, not a tangible thing.
Examples:
* The process of learning a new language is challenging but rewarding. (The process itself is not a physical object)
* We need to simplify the process for submitting applications. (The process is a series of steps, not a physical thing)
While you can have a "process" for physical things (like making bread), the noun itself refers to the idea of the sequence of actions, not the bread itself.