gran vs nanna

gran and nanna both are nouns.

Word	Noun	Adjective	Verb	Adverb
gran	Yes	No	No	No
nanna	Yes	No	No	No

As nouns, gran and nanna are synonyms defined as:

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

gran (noun)	nanna (noun)
the mother of your father or mother	the mother of your father or mother