museum vs depository

museum and depository both are nouns.

Word	Noun	Adjective	Verb	Adverb
museum	Yes	No	No	No
depository	Yes	No	No	No

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

museum: a depository for collecting and displaying objects having scientific or historical or artistic value
depository: a facility where things can be deposited for storage or safekeeping

Other hypernyms of museum include deposit, depositary, repository.

museum (noun)	depository (noun)
a depository for collecting and displaying objects having scientific or historical or artistic value	a facility where things can be deposited for storage or safekeeping