Fosterages refer to the experience or act of fostering or providing care for someone who is not one's biological child. An alternative term that can be used in place of fosterages is guardianship, which also describes the situation where a guardian takes responsibility for a child's welfare. Another synonym for fosterages is caregiving, which refers to providing care and support for someone who needs it. Adoption is another related term that can serve as a synonym for fosterages, as it entails taking in and raising a child who is not one's biological offspring. Overall, these terms convey the idea of taking responsibility for someone else's well-being, often in a parental or guardianship capacity.