ethics vs eudemonism

ethics and eudemonism both are nouns.

Word	Noun	Adjective	Verb	Adverb
ethics	Yes	No	No	No
eudemonism	Yes	No	No	No

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

ethics: the philosophical study of moral values and rules
eudemonism: an ethical system that evaluates actions by reference to personal well-being through a life based on reason

Other hyponyms of ethics include bioethics, casuistry, endaemonism, hedonism, ethical nihilism, moral nihilism.

ethics (noun)	eudemonism (noun)
the philosophical study of moral values and rules	an ethical system that evaluates actions by reference to personal well-being through a life based on reason
motivation based on ideas of right and wrong