still room vs pantry

still room and pantry both are nouns.

Word	Noun	Adjective	Verb	Adverb
still room	Yes	No	No	No
pantry	Yes	No	No	No

As nouns, pantry is a hypernym of still room; that is, pantry is a word with a broader meaning than still room:

still room: a pantry or storeroom connected with the kitchen (especially in a large house) for preparing tea and beverages and for storing liquors and preserves and tea etc
pantry: a small storeroom for storing foods or wines

Other hypernyms of still room include buttery, larder.

still room (noun)	pantry (noun)
a pantry or storeroom connected with the kitchen (especially in a large house) for preparing tea and beverages and for storing liquors and preserves and tea etc	a small storeroom for storing foods or wines