Genetous idiocy, a term coined by psychologist Alfred Binet, describes individuals with profound intellectual disability. While this specific term may not be widely recognized or prevalent in everyday language, there exist several alternative synonyms used to convey the same meaning. "Severe mental retardation" or "profound cognitive impairment" are commonly employed terms when referring to individuals with extremely limited intellectual functioning. "Profound developmental delay" also serves as an appropriate synonym, emphasizing the significant delay in a person's overall development. These synonyms are used in professional and academic contexts to describe the condition of individuals who experience significant challenges in their cognitive abilities and adaptive functioning.