Existential philosophy, also referred to as existentialism, is a philosophical movement that emphasize on individual existence, freedom, and choice. There are various synonymous terms used to describe the concept of existential philosophy including philosophical existentialism, existential thought, and existentialist philosophy. Other synonyms for existential philosophy include existential phenomenology, existential psychoanalysis, and neo-existentialism. These terms are often used interchangeably to describe the same broader philosophical concept which emphasizes on the individual's subjective experiential state as the foundation of philosophical inquiry. In essence, the terms describe a philosophical approach that aims to study the nature of human existence, individual freedom, and the search for meaning and purpose in life.