WordNet records no synonym and no antonym for unification church. It is the only member of its synset, which is common for technical, taxonomic and single-sense vocabulary — there is no other English word that means the same thing. The broader and narrower terms below are the useful relations in that case.
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.
a Christian church (with some Buddhist elements) founded in 1954 by Sun Myung Moon and known for staging mass weddings and other communal activities
Synonyms, antonyms and the broader and narrower relations for unification church come from Princeton University’s WordNet. Full sources and licences.