oyster bank vs workplace

oyster bank and workplace both are nouns.

Word	Noun	Adjective	Verb	Adverb
oyster bank	Yes	No	No	No
workplace	Yes	No	No	No

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

Other hypernyms of oyster bank include work.

oyster bank (noun)	workplace (noun)
a workplace where oysters are bred and grown	a place where work is done