bioethics vs moral philosophy

bioethics and moral philosophy both are nouns.

Word	Noun	Adjective	Verb	Adverb
bioethics	Yes	No	No	No
moral philosophy	Yes	No	No	No

As nouns, moral philosophy is a hypernym of bioethics; that is, moral philosophy is a word with a broader meaning than bioethics:

bioethics: the branch of ethics that studies moral values in the biomedical sciences
moral philosophy: the philosophical study of moral values and rules

Other hypernyms of bioethics include ethics.

bioethics (noun)	moral philosophy (noun)
the branch of ethics that studies moral values in the biomedical sciences	the philosophical study of moral values and rules