grandmother vs nan

grandmother and nan both are nouns.

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

As nouns, grandmother and nan are synonyms defined as:

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

As nouns, nan is a hyponym of grandmother; that is, nan is a word with a more specific, narrower meaning than grandmother:

grandmother (noun)	nan (noun)
the mother of your father or mother	leavened bread baked in a clay oven in India; usually shaped like a teardrop
	your grandmother
	the mother of your father or mother