promulgation vs proclamation

promulgation and proclamation both are nouns.

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

As nouns, promulgation and proclamation are synonyms defined as:

promulgation and proclamation: the formal act of proclaiming; giving public notice

As nouns, proclamation is a hypernym of promulgation; that is, proclamation 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
proclamation: a formal public statement

Other hypernyms of promulgation include announcement, annunciation, declaration.

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