Breadstuff and Sourdough bread

Breadstuff noun - Food made from dough of flour or meal and usually raised with yeast or baking powder and then baked.

Sourdough bread and breadstuff are semantically related. In some cases you can replace phrase "Sourdough bread" with "Breadstuff", this terms are similar.

Sourdough bread noun - Made with a starter of a small amount of dough in which fermentation is active.

Breadstuff and sourdough bread are semantically related. You can use "Breadstuff" instead a noun phrase "Sourdough bread".