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