There are several synonyms that can be used for the term "adopted children." One common substitute is "adoptees," which refers to a child who has been legally adopted by a parent or parents who are not their biological parents. Another synonym could be "foster children," which denotes children who are placed in the care of adults who are not their biological parents, usually due to situations such as neglect or abuse. Other possible synonyms for "adopted children" might include "adopted kids," "adoptive children," or "children from adoption." Regardless of the term used, it's important to remember that each child's adoption story is unique.