Your understanding might be that your mother will always drive you to school if you miss the bus. Knowledge about a subject, situation, etc. Both comprehension and understanding can be used to talk about someone's ability to understand something.
Pyramid Of Success
How to use understanding in a sentence. He noted bond's apparent lack of. Understanding implies abilities and dispositions with respect to an object.
Comprehension usually used with of.
Or about how something works: Understanding is a relation between the knower and an object of understanding. The meaning of understanding is a mental grasp : Understanding a concept means you get it.