loaf of bread vs bread

loaf of bread and bread both are nouns.

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

As nouns, bread is a hypernym of loaf of bread; that is, bread 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
bread: 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 breadstuff, staff of life.

loaf of bread (noun)	bread (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
	informal terms for money

loaf of bread (verb)	bread (verb)
	cover with bread crumbs