larder vs stillroom

larder and stillroom both are nouns.

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

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

larder: 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 larder include still room.

larder (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
a supply of food especially for a household