roast pork vs roast

roast pork and roast both are nouns.

Word	Noun	Adjective	Verb	Adverb
roast pork	Yes	No	No	No
roast	Yes	Yes	Yes	No

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

roast pork: cut of pork suitable for roasting
roast: a piece of meat roasted or for roasting and of a size for slicing into more than one portion

Other hypernyms of roast pork include joint.

roast pork (noun)	roast (noun)
cut of pork suitable for roasting	negative criticism
	a piece of meat roasted or for roasting and of a size for slicing into more than one portion

roast pork (adjective)	roast (adjective)
	(meat) cooked by dry heat in an oven

roast pork (verb)	roast (verb)
	cook with dry heat, usually in an oven
	subject to laughter or ridicule