casuistry vs moral philosophy

casuistry and moral philosophy both are nouns.

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

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

casuistry: moral philosophy based on the application of general ethical principles to resolve moral dilemmas
moral philosophy: the philosophical study of moral values and rules

Other hypernyms of casuistry include ethics.

casuistry (noun)	moral philosophy (noun)
moral philosophy based on the application of general ethical principles to resolve moral dilemmas	the philosophical study of moral values and rules
argumentation that is specious or excessively subtle and intended to be misleading