Self-delusion is a term that describes a person's misguided perception of reality about themselves or a given situation, leading to false beliefs and ideas. Synonyms of self-delusion include self-deception, self-imposed blindness, self-aggrandizement, and self-inflicted deception. Other synonyms include illusion, fantasy, hallucination, and delusion. These words all describe a form of misguided belief in oneself, whether through inflated ego or a complete disregard for reality. They represent the pitfalls of our own human nature and highlight the importance of maintaining a clear and objective perspective to avoid falling into self-delusion or any of its synonyms.