proclamation vs declaration

proclamation and declaration both are nouns.

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

As nouns, proclamation and declaration are synonyms defined as:

Other synonyms of proclamation include announcement, annunciation.

proclamation (noun)	declaration (noun)
the formal act of proclaiming; giving public notice	a statement that is emphatic and explicit (spoken or written)
a formal public statement	a formal expression by a meeting; agreed to by a vote
	(law) unsworn statement that can be admitted in evidence in a legal transaction
	a formal public statement
	(contract bridge) the highest bid becomes the contract setting the number of tricks that the bidder must make
	a statement of taxable goods or of dutiable properties