Step-parent is a term used to refer to someone who is not the biological parent of a child, but has married the child's biological parent. However, there are different words that can be used to refer to this role depending on the culture or language. For example, in some cultures, the word 'bonus-parent' or 'bonus-mom/dad' is used to describe a step-parent. In French language, they use the term 'beau-parent' which translates to beautiful parent. Further, the word 'co-parent' is used to refer to a step-parent who is actively involved in the child's life and helps with raising them. Ultimately, there are many synonyms for step-parent that can provide a different perspective on this important role.