gasworks vs workplace

gasworks and workplace both are nouns.

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

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

Other hypernyms of gasworks include work.

gasworks (noun)	workplace (noun)
the workplace where coal gas is manufactured	a place where work is done