Both comprehension and understanding can be used to talk about someone's ability to understand something. He noted bond's apparent lack of. Or about how something works:
Understanding the Basics of Alternating Current (AC) A Comprehensive Guide
Understanding implies abilities and dispositions with respect to an object. Mental process of a person who comprehends; Knowledge about a subject, situation, etc.
How to use understanding in a sentence.
Understanding is a relation between the knower and an object of understanding. Comprehension usually used with of. The meaning of understanding is a mental grasp :