grannie vs grandmother

grannie and grandmother both are nouns.

Word	Noun	Adjective	Verb	Adverb
grannie	Yes	No	No	No
grandmother	Yes	No	No	No

As nouns, grannie and grandmother are synonyms defined as:

Other synonyms of grannie include gran, grandma, granny, nan, nanna.

grannie (noun)	grandmother (noun)
the mother of your father or mother	the mother of your father or mother