gag law vs gag rule

gag law and gag rule both are nouns.

Word	Noun	Adjective	Verb	Adverb
gag law	Yes	No	No	No
gag rule	Yes	No	No	No

As nouns, gag law and gag rule are synonyms defined as:

gag law and gag rule: a rule for limiting or ending debate in a deliberative body

Other synonyms of gag law include closure, cloture.

gag law (noun)	gag rule (noun)
any law that limits freedom of the press	a rule for limiting or ending debate in a deliberative body
a rule for limiting or ending debate in a deliberative body