ironworks vs workplace

ironworks and workplace both are nouns.

Word	Noun	Adjective	Verb	Adverb
ironworks	Yes	No	No	No
workplace	Yes	No	No	No

As nouns, workplace is a hypernym of ironworks; that is, workplace is a word with a broader meaning than ironworks:

Other hypernyms of ironworks include work.

ironworks (noun)	workplace (noun)
the workplace where iron is smelted or where iron goods are made	a place where work is done