The term "IQ" is often used to describe a person's intelligence. However, there are many synonyms that can be used interchangeably with IQ. These include terms such as mental aptitude, cognitive ability, intellectual capacity, and brain power. Each of these words encompasses the idea of a person's ability to think critically and solve problems. Other synonyms for IQ include intelligence quotient, cognitive function, and intellectual capacity. While these words differ slightly in their meanings, they all point to the same concept of measuring a person's intelligence. Regardless of the term used, it is important to remember that intelligence comes in many different forms, and IQ is just one measurement of it.