breadstuff vs foodstuff

breadstuff and foodstuff both are nouns.

Word	Noun	Adjective	Verb	Adverb
breadstuff	Yes	No	No	No
foodstuff	Yes	No	No	No

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

Other hypernyms of breadstuff include food product.

breadstuff (noun)	foodstuff (noun)
food made from dough of flour or meal and usually raised with yeast or baking powder and then baked	(usually plural) consumer goods sold by a grocer
flour or meal or grain used in baking bread	a substance that can be used or prepared for use as food