nan vs staff of life

nan and staff of life both are nouns.

Word	Noun	Adjective	Verb	Adverb
nan	Yes	No	No	No
staff of life	Yes	No	No	No

As nouns, staff of life is a hypernym of nan; that is, staff of life is a word with a broader meaning than nan:

nan: leavened bread baked in a clay oven in India; usually shaped like a teardrop
staff of life: food made from dough of flour or meal and usually raised with yeast or baking powder and then baked

Other hypernyms of nan include bread, breadstuff.

nan (noun)	staff of life (noun)
leavened bread baked in a clay oven in India; usually shaped like a teardrop	food made from dough of flour or meal and usually raised with yeast or baking powder and then baked
your grandmother
the mother of your father or mother