store vs treasure house

store and treasure house both are nouns.

Word	Noun	Adjective	Verb	Adverb
store	Yes	No	Yes	No
treasure house	Yes	No	No	No

As nouns, treasure house is a hyponym of store; that is, treasure house is a word with a more specific, narrower meaning than store:

store (noun)	treasure house (noun)
a mercantile establishment for the retail sale of goods or services	a storehouse for treasures
a depository for goods
an electronic memory device
a supply of something available for future use

store (verb)	treasure house (verb)
keep or lay aside for future use
find a place for and put away for storage