cellar vs storey

cellar and storey both are nouns.

Word	Noun	Adjective	Verb	Adverb
cellar	Yes	No	No	No
storey	Yes	No	No	No

As nouns, storey is a hypernym of cellar; that is, storey is a word with a broader meaning than cellar:

cellar: the lowermost portion of a structure partly or wholly below ground level; often used for storage
storey: a structure consisting of a room or set of rooms at a single position along a vertical scale

Other hypernyms of cellar include floor, level, story.

cellar (noun)	storey (noun)
the lowermost portion of a structure partly or wholly below ground level; often used for storage	a structure consisting of a room or set of rooms at a single position along a vertical scale
storage space where wines are stored
an excavation where root vegetables are stored