As nouns the difference between nan and grandma
is that nan is (british) affectionate name for a grandmother or nan can be while grandma is (informal) grandmother.
nan
English
Etymology 1
Possibly derived from a (etyl) language.
Noun
(
en noun)
(British) Affectionate name for a grandmother.
Synonyms
* nana
* nanna
Etymology 2
From (etyl) .
grandma
English
Noun
(
en noun)
(informal) grandmother
Related terms
* grandpa
Anagrams
*