science museum vs museum

science museum and museum both are nouns.

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

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

science museum: a museum that collects and displays objects having scientific interest
museum: a depository for collecting and displaying objects having scientific or historical or artistic value

science museum (noun)	museum (noun)
a museum that collects and displays objects having scientific interest	a depository for collecting and displaying objects having scientific or historical or artistic value