staging vs summer stock

staging and summer stock both are nouns.

Word	Noun	Adjective	Verb	Adverb
staging	Yes	No	No	No
summer stock	Yes	No	No	No

As nouns, summer stock is a hyponym of staging; that is, summer stock is a word with a more specific, narrower meaning than staging:

staging: the production of a drama on the stage
summer stock: theatrical productions performed by a stock company during the summer

Other hyponyms of staging include coup de theatre.

staging (noun)	summer stock (noun)
travel by stagecoach	theatrical productions performed by a stock company during the summer
getting rid of a stage of a multistage rocket
a system of scaffolds
the production of a drama on the stage