declaration vs proclamation

declaration and proclamation both are nouns.

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

As nouns, declaration and proclamation are synonyms defined as:

Other synonyms of declaration include announcement, annunciation.

declaration (noun)	proclamation (noun)
a statement that is emphatic and explicit (spoken or written)	the formal act of proclaiming; giving public notice
a formal expression by a meeting; agreed to by a vote	a formal public statement
(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