area vs responsibility

area and responsibility both are nouns.

Word	Noun	Adjective	Verb	Adverb
area	Yes	No	No	No
responsibility	Yes	No	No	No

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

area (noun)	responsibility (noun)
a part of a structure having some specific characteristic or function	the social force that binds you to the courses of action demanded by that force
the extent of a 2-dimensional surface enclosed within a boundary	a form of trustworthiness; the trait of being answerable to someone for something or being responsible for one's conduct
a part of an animal that has a special function or is supplied by a given artery or nerve	the proper sphere or extent of your activities
a subject of study
a particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography)
a particular environment or walk of life