civil law vs case law

civil law and case law both are nouns.

Word	Noun	Adjective	Verb	Adverb
civil law	Yes	No	No	No
case law	Yes	No	No	No

As nouns, case law is a hyponym of civil law; that is, case law is a word with a more specific, narrower meaning than civil law:

civil law: the body of laws established by a state or nation for its own regulation
case law: (civil law) a law established by following earlier judicial decisions

Other hyponyms of civil law include common law, precedent, legislation, statute law.

civil law (noun)	case law (noun)
the legal code of ancient Rome; codified under Justinian; the basis for many modern systems of civil law	(civil law) a law established by following earlier judicial decisions
the body of laws established by a state or nation for its own regulation	a system of jurisprudence based on judicial precedents rather than statutory laws