church vs abbey

church and abbey both are nouns.

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

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

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

church (noun)	abbey (noun)
a service conducted in a house of worship	a monastery ruled by an abbot
a place for public (especially Christian) worship	a convent ruled by an abbess
one of the groups of Christians who have their own beliefs and forms of worship	a church associated with a monastery or convent
the body of people who attend or belong to a particular local church

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