hoecake vs johnny cake

hoecake and johnny cake both are nouns.

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

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

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

Other hypernyms of hoecake include johnnycake, journey cake.

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