Crib death, also known as sudden infant death syndrome (SIDS), is a tragic and unexplained phenomenon that can occur in otherwise healthy infants. While there are no true synonyms for this term, as SIDS is a specific medical designation, there are other phrases that may be used to describe similar circumstances. These include sudden unexpected infant death (SUID) and sudden unexplained death in infancy (SUDI). Both of these terms denote an unexpected and tragic end to the life of a young child, and further research into their causes and prevention is crucial in reducing the incidence of such tragedies.