Black bread and Rye bread

Black bread noun - Bread made of coarse rye flour.

Rye bread and black bread are semantically related. In some cases you can use "Rye bread" instead a noun phrase "Black bread".

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

Black bread and rye bread are semantically related. Sometimes you can replace phrase "Black bread" with "Rye bread", this phrases are similar.