comprehension has 1 distinct synonym spread across 1 of its 2 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. Its one recorded opposite is incomprehension.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
an ability to understand the meaning or importance of something (or the knowledge acquired as a result)
“how you can do that is beyond my comprehension”
the relation of comprising something
“he admired the inclusion of so many ideas in such a short work”
Synonyms, antonyms and the broader and narrower relations for comprehension come from Princeton University’s WordNet. Full sources and licences.