rye bread vs staff of life

rye bread and staff of life both are nouns.

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

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

rye bread: any of various breads made entirely or partly with rye flour
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 rye bread include bread, breadstuff.

rye bread (noun)	staff of life (noun)
any of various breads made entirely or partly with rye flour	food made from dough of flour or meal and usually raised with yeast or baking powder and then baked