fishbowl vs marine museum

fishbowl and marine museum both are nouns.

Word	Noun	Adjective	Verb	Adverb
fishbowl	Yes	No	No	No
marine museum	Yes	No	No	No

As nouns, marine museum is a hypernym of fishbowl; that is, marine museum is a word with a broader meaning than fishbowl:

fishbowl: a transparent bowl in which small fish are kept
marine museum: a tank or pool or bowl filled with water for keeping live fish and underwater animals

Other hypernyms of fishbowl include aquarium, fish tank, bowl.

fishbowl (noun)	marine museum (noun)
a transparent bowl in which small fish are kept	a tank or pool or bowl filled with water for keeping live fish and underwater animals
a state of affairs in which you have no privacy