promulgator vs lawgiver

promulgator and lawgiver both are nouns.

Word	Noun	Adjective	Verb	Adverb
promulgator	Yes	No	No	No
lawgiver	Yes	No	No	No

As nouns, lawgiver is a hypernym of promulgator; that is, lawgiver is a word with a broader meaning than promulgator:

promulgator: (law) one who promulgates laws (announces a law as a way of putting it into execution)
lawgiver: a maker of laws; someone who gives a code of laws

Other hypernyms of promulgator include lawmaker.

promulgator (noun)	lawgiver (noun)
(law) one who promulgates laws (announces a law as a way of putting it into execution)	a maker of laws; someone who gives a code of laws