What is another word for stepgrandmother?
Pronunciation: [stˈɛpɡɹɐndmˌɒθə] (IPA) 
When talking about family members, it's always a good idea to have a variety of descriptive words to choose from. The term "stepgrandmother" refers to the spouse of one's grandparent, and while it is a commonly used term, there are alternative synonyms that you can use. Some options include: "grandmother-in-law," "bonus grandma," "granny," "adoptive grandmother," "grandparent through marriage," or "stepparent's mother." These synonyms can help you better describe the relationship between you and your stepgrandmother, and can add variety to your vocabulary. Regardless of what term you choose, the most important thing is to show appreciation for the person who is a part of your family.
