packing plant vs works

packing plant and works both are nouns.

Word	Noun	Adjective	Verb	Adverb
packing plant	Yes	No	No	No
works	Yes	No	No	No

As nouns, works is a hypernym of packing plant; that is, works is a word with a broader meaning than packing plant:

packing plant: a plant where livestock are slaughtered and processed and packed as meat products
works: buildings for carrying on industrial labor

Other hypernyms of packing plant include industrial plant, plant.

packing plant (noun)	works (noun)
a plant where livestock are slaughtered and processed and packed as meat products	performance of moral or religious acts
	the internal mechanism of a device
	buildings for carrying on industrial labor
	everything available; usually preceded by `the'