church has 3 distinct synonyms spread across 3 of its 5 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
one of the groups of Christians who have their own beliefs and forms of worship
Synonyms, antonyms and the broader and narrower relations for church come from Princeton University’s WordNet. Full sources and licences.
a place for public (especially Christian) worship
“the church was empty”
a service conducted in a house of worship
“don't be late for church”
the body of people who attend or belong to a particular local church
“our church is hosting a picnic next week”
perform a special church rite or service for
“church a woman after childbirth”