Here are some examples of words with the prefix "cog":
* Cognition: the mental process of acquiring knowledge and understanding through thought, experience, and the senses.
* Cognizant: aware of something; having knowledge or understanding.
* Cognizable: capable of being known or perceived.
* Incognito: disguised; having one's identity concealed.
* Recognize: to identify someone or something that one has seen or known before.
It's important to note that the prefix "cog" is sometimes used in words related to "wheels" or "gears" due to the similarity with the word "cog" meaning a tooth on a wheel. However, this meaning is less common than the "knowing" or "thinking" meaning.