promulgation vs annunciation

promulgation and annunciation both are nouns.

Word	Noun	Adjective	Verb	Adverb
promulgation	Yes	No	No	No
annunciation	Yes	No	No	No

As nouns, annunciation is a hypernym of promulgation; that is, annunciation is a word with a broader meaning than promulgation:

promulgation: the official announcement of a new law or ordinance whereby the law or ordinance is put into effect
annunciation: a formal public statement

Other hypernyms of promulgation include announcement, declaration, proclamation.

promulgation (noun)	annunciation (noun)
the formal act of proclaiming; giving public notice	a formal public statement
a public statement containing information about an event that has happened or is going to happen
the official announcement of a new law or ordinance whereby the law or ordinance is put into effect