rye bread vs bread

rye bread and bread both are nouns.

Word	Noun	Adjective	Verb	Adverb
rye bread	Yes	No	No	No
bread	Yes	No	Yes	No

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

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

rye bread (noun)	bread (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
	informal terms for money

rye bread (verb)	bread (verb)
	cover with bread crumbs