storage vs granary

storage and granary both are nouns.

Word	Noun	Adjective	Verb	Adverb
storage	Yes	No	No	No
granary	Yes	No	No	No

As nouns, granary is a hyponym of storage; that is, granary is a word with a more specific, narrower meaning than storage:

storage (noun)	granary (noun)
the commercial enterprise of storing goods and materials	a storehouse for threshed grain or animal feed
the act of storing something
depositing in a warehouse
a depository for goods
an electronic memory device
(computer science) the process of storing information in a computer memory or on a magnetic tape or disk