Justinian code vs legal code

Justinian code and legal code both are nouns.

Word	Noun	Adjective	Verb	Adverb
Justinian code	Yes	No	No	No
legal code	Yes	No	No	No

As nouns, legal code is a hypernym of Justinian code; that is, legal code is a word with a broader meaning than Justinian code:

Justinian code: the legal code of ancient Rome; codified under Justinian; the basis for many modern systems of civil law
legal code: a code of laws adopted by a state or nation

Justinian code (noun)	legal code (noun)
the legal code of ancient Rome; codified under Justinian; the basis for many modern systems of civil law	a code of laws adopted by a state or nation