pantry vs stillroom

pantry and stillroom both are nouns.

Word	Noun	Adjective	Verb	Adverb
pantry	Yes	No	No	No
stillroom	Yes	No	No	No

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

pantry: a small storeroom for storing foods or wines
stillroom: 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

Other hyponyms of pantry include still room.

pantry (noun)	stillroom (noun)
a small storeroom for storing foods or wines	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