Childproof is a term that refers to a product or environment that is designed to prevent children from accessing substances or objects that could be harmful to them. Some synonyms for childproof include baby-proof, hazard-proof, and child-safe. Other related terms are child-resistant or tamper-resistant, which describe products that are difficult for children to open or access, and foolproof, which means that something is designed so that it cannot be used incorrectly. Overall, these synonyms reflect the importance of making sure that children are protected from potential dangers and hazards in their surroundings.