Roman law vs Justinian code

Roman law and Justinian code both are nouns.

Word	Noun	Adjective	Verb	Adverb
Roman law	Yes	No	No	No
Justinian code	Yes	No	No	No

As nouns, Roman law and Justinian code are synonyms defined as:

Roman law and Justinian code: the legal code of ancient Rome; codified under Justinian; the basis for many modern systems of civil law

Other synonyms of Roman law include civil law, jus civile.

Roman law (noun)	Justinian code (noun)
the legal code of ancient Rome; codified under Justinian; the basis for many modern systems of civil law	the legal code of ancient Rome; codified under Justinian; the basis for many modern systems of civil law