cellar vs basement

cellar and basement both are nouns.

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

As nouns, cellar and basement are synonyms defined as:

cellar and basement: the lowermost portion of a structure partly or wholly below ground level; often used for storage

cellar (noun)	basement (noun)
the lowermost portion of a structure partly or wholly below ground level; often used for storage	the lowermost portion of a structure partly or wholly below ground level; often used for storage
storage space where wines are stored	the ground floor facade or interior in Renaissance architecture
an excavation where root vegetables are stored