The word “grandma” or “grandmother” can be capitalized depending on how it is used in a sentence or title. When used generically in a sentence such as: “my grandma said to visit him,” then the word grandma is lowercase because it is a generic noun.
Correct: My grandma is the best.
Correct: My grandmother loves me.
However, if you are addressing your grandma directly, such as when asking a question, then you should capitalize the word grandma.
Correct: Can I go to the movies, Grandma?
Correct: Can I go to the movies, Grandmother?
The same holds true for any other names you might call your grandmother such as “papa” or “papap.”
For more title capitalization questions, use our free title capitalization tool here.