white bread vs bread

white bread and bread both are nouns.

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

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

white bread: bread made with finely ground and usually bleached 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 white bread include breadstuff, staff of life.

white bread (noun)	bread (noun)
bread made with finely ground and usually bleached 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

white bread (verb)	bread (verb)
	cover with bread crumbs