Extra-sensory perception, commonly known as ESP, can be defined as a level of sensory perception that goes beyond the usual five senses. It's a concept that has been studied and researched for decades, resulting in several synonyms for the term. Some common synonyms for extra-sensory perception include clairvoyance, telepathy, psychic ability, sixth sense, intuition, and precognition. Clairvoyance refers to the ability to see clearly beyond physical limitations, telepathy is the ability to communicate mentally without using words, while psychic ability is a broader term that encompasses a range of paranormal abilities. The terms sixth sense, intuition, and precognition refer to the ability to sense or perceive things beyond the scope of the five senses.