pigs' knuckles vs pork

pigs' knuckles and pork both are nouns.

Word	Noun	Adjective	Verb	Adverb
pigs' knuckles	Yes	No	No	No
pork	Yes	No	No	No

As nouns, pork is a hypernym of pigs' knuckles; that is, pork is a word with a broader meaning than pigs' knuckles:

pigs' knuckles: feet or knuckles of hogs used as food; pickled or stewed or jellied
pork: meat from a domestic hog or pig

Other hypernyms of pigs' knuckles include porc.

pigs' knuckles (noun)	pork (noun)
feet or knuckles of hogs used as food; pickled or stewed or jellied	meat from a domestic hog or pig
	a legislative appropriation designed to ingratiate legislators with their constituents