johnny cake vs hoecake

johnny cake and hoecake both are nouns.

Word	Noun	Adjective	Verb	Adverb
johnny cake	Yes	No	No	No
hoecake	Yes	No	No	No

As nouns, hoecake is a hyponym of johnny cake; that is, hoecake is a word with a more specific, narrower meaning than johnny cake:

johnny cake: cornbread usually cooked pancake-style on a griddle (chiefly New England)
hoecake: thin usually unleavened johnnycake made of cornmeal; originally baked on the blade of a hoe over an open fire (southern)

Other hyponyms of johnny cake include Shawnee cake.

johnny cake (noun)	hoecake (noun)
cornbread usually cooked pancake-style on a griddle (chiefly New England)	thin usually unleavened johnnycake made of cornmeal; originally baked on the blade of a hoe over an open fire (southern)