church vs duomo

church and duomo both are nouns.

Word	Noun	Adjective	Verb	Adverb
church	Yes	No	Yes	No
duomo	Yes	No	No	No

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

Other hyponyms of church include abbey, basilica, cathedral, cathedral, kirk.

church (noun)	duomo (noun)
a service conducted in a house of worship	the principal Christian church building of a bishop's diocese
a place for public (especially Christian) worship
one of the groups of Christians who have their own beliefs and forms of worship
the body of people who attend or belong to a particular local church

church (verb)	duomo (verb)
perform a special church rite or service for