parliamentary procedure vs parliamentary law

parliamentary procedure and parliamentary law both are nouns.

Word	Noun	Adjective	Verb	Adverb
parliamentary procedure	Yes	No	No	No
parliamentary law	Yes	No	No	No

As nouns, parliamentary procedure and parliamentary law are synonyms defined as:

parliamentary procedure and parliamentary law: a body of rules followed by an assembly

Other synonyms of parliamentary procedure include order, rules of order.

parliamentary procedure (noun)	parliamentary law (noun)
a body of rules followed by an assembly	a body of rules followed by an assembly