Roman law vs jus civile

Roman law and jus civile both are nouns.

Word	Noun	Adjective	Verb	Adverb
Roman law	Yes	No	No	No
jus civile	Yes	No	No	No

As nouns, Roman law and jus civile are synonyms defined as:

Roman law and jus civile: 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, Justinian code.

Roman law (noun)	jus civile (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