pound cake vs loaf

pound cake and loaf both are nouns.

Word	Noun	Adjective	Verb	Adverb
pound cake	Yes	No	No	No
loaf	Yes	No	Yes	No

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

pound cake: rich loaf cake made of a pound each of butter and sugar and flour
loaf: a quantity of food (other than bread) formed in a particular shape

Other hypernyms of pound cake include cake.

pound cake (noun)	loaf (noun)
rich loaf cake made of a pound each of butter and sugar and flour	a shaped mass of baked bread that is usually sliced before eating
	a quantity of food (other than bread) formed in a particular shape

pound cake (verb)	loaf (verb)
	be about a place without any apparent purpose
	be lazy or idle