Breadstuff and Rye bread

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

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

Rye bread noun - Any of various breads made entirely or partly with rye flour.

Breadstuff and rye bread are semantically related. You can use "Breadstuff" instead a noun phrase "Rye bread".