These words refer to the releasing of information or rulings in official or public ways. More informally, declare can relate simply to forceful or direct assertion: She declared that she didn’t want to see him again. This possible implication of forcefulness may or may not be present when the word applies to official rulings.

• The judges declared the contest a tie; The military police declared the hotel out of bounds.

In any case, the word here emphasizes an authoritative utterance.

Announce pertains almost exclusively to public or official statements, but these can be declared in any medium and they may be informative as well as authoritative decisions.

• He called a press conference to announce his candidacy; They announced to the assembled guests that they were engaged to be married. The officials announced new rules to cover the championship bout.

On an informal level, proclaim can indicate the declaring of a considered and definite decision or judgement: She proclaimed the dress to be too daring for her personality. Pertaining to official utterance, the word stresses extreme formality: the ceremony at which he would officially be proclaimed archbishop. The word can also indicate resolute conviction: I proclaim the honourable member’s statement to be a complete falsehood. Enunciate carries over its reference to clear speech when it applies to official statements, since here it stresses the careful but authoritative spelling out of detailed rules or doctrine: the pope who first enunciated the doctrine of the Assumption of the Virgin.

The remaining words all now pertain primarily to the dissemination of information through various communication media. Publish pertains to books, magazines, newspapers and other printed media. Broadcast once referred merely to making something known far and wide, but more often now it pertains to anything programmed on radio or television or announced over a public-address system. Advertise now indicates a paid presentation to win popularity for a product or candidate. Unlike publish and broadcast , however, advertise can suggest every conceivable medium in which paid messages can appear. A company may advertise its products by means of newspapers, magazines, television, hoardings, and even skywriting.