banns vs promulgation

banns and promulgation both are nouns.

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

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

banns: a public announcement of a proposed marriage
promulgation: a public statement containing information about an event that has happened or is going to happen

Other hypernyms of banns include announcement.

banns (noun)	promulgation (noun)
a public announcement of a proposed marriage	the formal act of proclaiming; giving public notice
	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