obedience vs filial duty

obedience and filial duty both are nouns.

Word	Noun	Adjective	Verb	Adverb
obedience	Yes	No	No	No
filial duty	Yes	No	No	No

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

obedience (noun)	filial duty (noun)
the act of obeying; dutiful or submissive behavior with respect to another person	duty of a child to its parents
behavior intended to please your parents
the trait of being willing to obey