journey cake vs cornbread

journey cake and cornbread both are nouns.

Word	Noun	Adjective	Verb	Adverb
journey cake	Yes	No	No	No
cornbread	Yes	No	No	No

As nouns, cornbread is a hypernym of journey cake; that is, cornbread is a word with a broader meaning than journey cake:

journey cake: cornbread usually cooked pancake-style on a griddle (chiefly New England)
cornbread: bread made primarily of cornmeal

journey cake (noun)	cornbread (noun)
cornbread usually cooked pancake-style on a griddle (chiefly New England)	bread made primarily of cornmeal