announcer vs muezzin

announcer and muezzin both are nouns.

Word	Noun	Adjective	Verb	Adverb
announcer	Yes	No	No	No
muezzin	Yes	No	No	No

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

announcer: someone who proclaims a message publicly
muezzin: the Muslim official of a mosque who summons the faithful to prayer from a minaret five times a day

Other hyponyms of announcer include caller, caller-out, caller, muadhdhin, muazzin, crier, town crier.

announcer (noun)	muezzin (noun)
reads news, commercials on radio or television	the Muslim official of a mosque who summons the faithful to prayer from a minaret five times a day
someone who proclaims a message publicly