responsibility vs arena

responsibility and arena both are nouns.

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

As nouns, arena is a hypernym of responsibility; that is, arena is a word with a broader meaning than responsibility:

Other hypernyms of responsibility include area, domain, field, orbit, sphere.

responsibility (noun)	arena (noun)
the social force that binds you to the courses of action demanded by that force	a playing field where sports events take place
a form of trustworthiness; the trait of being answerable to someone for something or being responsible for one's conduct	a large structure for open-air sports or entertainments
the proper sphere or extent of your activities	the central area of an ancient Roman amphitheater where contests and spectacles were held; especially an area that was strewn with sand
	a particular environment or walk of life