strongroom vs stowage

strongroom and stowage both are nouns.

Word	Noun	Adjective	Verb	Adverb
strongroom	Yes	No	No	No
stowage	Yes	No	No	No

As nouns, stowage is a hypernym of strongroom; that is, stowage is a word with a broader meaning than strongroom:

Other hypernyms of strongroom include storage room, storeroom.

strongroom (noun)	stowage (noun)
a burglarproof and fireproof room in which valuables are kept	the act of packing or storing away
	a room in which things are stored
	the charge for stowing goods