Announcement
Part of speech: noun
Definition: An act of announcing, or giving notice. That which conveys what is announced. The content which is announced.
Example sentence: The repeated announcements that the Russian resistance was definitely broken have been proved to be untrue.
Proclamation
Part of speech: noun
Definition: a statement which is proclaimed; a formal public announcement
Example sentence: The world is a challenging place in terms of wars and peace, basic human rights and freedoms. The Holy Father has a major role to play in global affairs. The pope is more than a spiritual leader. For the world's 1.2 billion Catholics, he is an inspiration of holiness and goodness and, above all, the faithful proclamation of the Gospel.