promulgation vs release

promulgation and release both are nouns.

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

As nouns, release is a hyponym of promulgation; that is, release is a word with a more specific, narrower meaning than promulgation:

promulgation: a public statement containing information about an event that has happened or is going to happen
release: an announcement distributed to members of the press in order to supplement or replace an oral presentation

Other hyponyms of promulgation include advisory, banns, handout, press release, notice, program, programme, wanted notice, wanted poster.

promulgation (noun)	release (noun)
the formal act of proclaiming; giving public notice	activity that frees or expresses creative energy or emotion
a public statement containing information about an event that has happened or is going to happen	the act of liberating someone or something
the official announcement of a new law or ordinance whereby the law or ordinance is put into effect	the termination of someone's employment (leaving them free to depart)
	the act of allowing a fluid to escape
	a formal written statement of relinquishment
	(music) the act or manner of terminating a musical phrase or tone
	merchandise issued for sale or public showing (especially a record or film)
	a device that when pressed will release part of a mechanism
	an announcement distributed to members of the press in order to supplement or replace an oral presentation
	a legal document evidencing the discharge of a debt or obligation
	euphemistic expressions for death
	a process that liberates or discharges something

promulgation (verb)	release (verb)
	generate and separate from cells or bodily fluids
	eliminate (a substance)
	make (assets) available
	prepare and issue for public distribution or sale
	release, as from one's grip
	let (something) fall or spill from a container
	release (gas or energy) as a result of a chemical reaction or physical decomposition
	part with a possession or right
	grant freedom to; free from confinement
	make (information) available for publication