commercial law vs law merchant

commercial law and law merchant both are nouns.

Word	Noun	Adjective	Verb	Adverb
commercial law	Yes	No	No	No
law merchant	Yes	No	No	No

As nouns, commercial law and law merchant are synonyms defined as:

commercial law and law merchant: the body of rules applied to commercial transactions; derived from the practices of traders rather than from jurisprudence

Other synonyms of commercial law include mercantile law.

commercial law (noun)	law merchant (noun)
the body of rules applied to commercial transactions; derived from the practices of traders rather than from jurisprudence	the body of rules applied to commercial transactions; derived from the practices of traders rather than from jurisprudence