whole wheat bread vs bread

whole wheat bread and bread both are nouns.

Word	Noun	Adjective	Verb	Adverb
whole wheat bread	Yes	No	No	No
bread	Yes	No	Yes	No

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

whole wheat bread: bread made with whole wheat flour
bread: food made from dough of flour or meal and usually raised with yeast or baking powder and then baked

Other hypernyms of whole wheat bread include breadstuff, staff of life.

whole wheat bread (noun)	bread (noun)
bread made with whole wheat flour	food made from dough of flour or meal and usually raised with yeast or baking powder and then baked
	informal terms for money

whole wheat bread (verb)	bread (verb)
	cover with bread crumbs