guardianship vs duty

guardianship and duty both are nouns.

Word	Noun	Adjective	Verb	Adverb
guardianship	Yes	No	No	No
duty	Yes	No	No	No

As nouns, duty is a hypernym of guardianship; that is, duty is a word with a broader meaning than guardianship:

guardianship: the responsibility of a guardian or keeper
duty: the social force that binds you to the courses of action demanded by that force

Other hypernyms of guardianship include obligation, responsibility.

guardianship (noun)	duty (noun)
the responsibility of a guardian or keeper	the social force that binds you to the courses of action demanded by that force
attention and management implying responsibility for safety	work that you are obliged to perform for moral or legal reasons
	a government tax on imports or exports