metalworks vs arsenal

metalworks and arsenal both are nouns.

Word	Noun	Adjective	Verb	Adverb
metalworks	Yes	No	No	No
arsenal	Yes	No	No	No

As nouns, arsenal is a hyponym of metalworks; that is, arsenal is a word with a more specific, narrower meaning than metalworks:

Other hyponyms of metalworks include armory, armoury, bell foundry, iron foundry.

metalworks (noun)	arsenal (noun)
factory where metal castings are produced	a military structure where arms and ammunition and other military equipment are stored and training is given in the use of arms
	a place where arms are manufactured
	all the weapons and equipment that a country has