garlic bread vs breadstuff

garlic bread and breadstuff both are nouns.

Word	Noun	Adjective	Verb	Adverb
garlic bread	Yes	No	No	No
breadstuff	Yes	No	No	No

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

garlic bread: French or Italian bread sliced and spread with garlic butter then crisped in the oven
breadstuff: food made from dough of flour or meal and usually raised with yeast or baking powder and then baked

Other hypernyms of garlic bread include bread, staff of life.

garlic bread (noun)	breadstuff (noun)
French or Italian bread sliced and spread with garlic butter then crisped in the oven	food made from dough of flour or meal and usually raised with yeast or baking powder and then baked
	flour or meal or grain used in baking bread