loaf of bread vs staff of life

loaf of bread and staff of life both are nouns.

Word	Noun	Adjective	Verb	Adverb
loaf of bread	Yes	No	No	No
staff of life	Yes	No	No	No

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

loaf of bread: a shaped mass of baked bread that is usually sliced before eating
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 loaf of bread include bread, breadstuff.

loaf of bread (noun)	staff of life (noun)
a shaped mass of baked bread that is usually sliced before eating	food made from dough of flour or meal and usually raised with yeast or baking powder and then baked