jellyroll vs sponge cake

jellyroll and sponge cake both are nouns.

Word	Noun	Adjective	Verb	Adverb
jellyroll	Yes	No	No	No
sponge cake	Yes	No	No	No

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

jellyroll: thin sheet of sponge cake spread with jelly and then rolled up to make a cylindrical cake
sponge cake: a light porous cake made with eggs and flour and sugar without shortening

jellyroll (noun)	sponge cake (noun)
thin sheet of sponge cake spread with jelly and then rolled up to make a cylindrical cake	a light porous cake made with eggs and flour and sugar without shortening