parliamentary procedure vs rules of order

parliamentary procedure and rules of order both are nouns.

Word	Noun	Adjective	Verb	Adverb
parliamentary procedure	Yes	No	No	No
rules of order	Yes	No	No	No

As nouns, parliamentary procedure and rules of order are synonyms defined as:

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

Other synonyms of parliamentary procedure include order, parliamentary law.

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