stillroom vs larder

stillroom and larder both are nouns.

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

As nouns, larder is a hypernym of stillroom; that is, larder is a word with a broader meaning than stillroom:

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
larder: a small storeroom for storing foods or wines

Other hypernyms of stillroom include buttery, pantry.

stillroom (noun)	larder (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
	a supply of food especially for a household