headcheese vs sausage

headcheese and sausage both are nouns.

Word	Noun	Adjective	Verb	Adverb
headcheese	Yes	No	No	No
sausage	Yes	No	No	No

As nouns, sausage is a hypernym of headcheese; that is, sausage is a word with a broader meaning than headcheese:

headcheese: sausage or jellied loaf made of chopped parts of the head meat and sometimes feet and tongue of a calf or pig
sausage: highly seasoned minced meat stuffed in casings

Other hypernyms of headcheese include loaf.

headcheese (noun)	sausage (noun)
sausage or jellied loaf made of chopped parts of the head meat and sometimes feet and tongue of a calf or pig	a small nonrigid airship used for observation or as a barrage balloon
	highly seasoned minced meat stuffed in casings