Open English Wordnet
Nouns
(n)duty, responsibility, obligationthe social force that binds you to the courses of action demanded by that force“we must instill a sense of duty in our children”, “every right implies a responsibility; every opportunity, an obligation; every possession, a duty” (John D.Rockefeller Jr)
(n)province, responsibilitythe proper sphere or extent of your activities“it was his province to take care of himself”
(n)responsibility, responsiblenessa form of trustworthiness; the trait of being answerable to someone for something or being responsible for one's conduct“he holds a position of great responsibility”