The word granddam is used to refer to a person's grandmother, especially the grandmother of their father or mother. However, there are several synonyms for this word that one can use to add variety to their writing. One such synonym is "grandmother," which is a more commonly used term. Other synonyms include "nana," "granny," "grammy," "oma," "mimi," and "gaga." These synonyms are often used affectionately by grandchildren to refer to their grandmothers. Choosing the right synonym can add a personal touch to your writing, making it more engaging and interesting to read.