Cognition is the "mental action or process of acquiring knowledge and understanding through thought, experience, and the senses".
Knowledge is a form of awareness or familiarity.
Set of all mental abilities and processes related to knowledge, attention, memory and working memory, judgment and evaluation, reasoning and "computation", problem solving and decision making, comprehension and production of language, etc.
Mental possession of information or skills, contributing to understanding
The mental action or process of acquiring knowledge through thought, experience and senses.
The psychological result of perception and learning and reasoning.
The process of knowing, of acquiring knowledge and understanding through thought and through the senses.
The fact of knowing about something; general understanding or familiarity with a subject, place, situation etc.