Open English Wordnet
Nouns
(n)Roman Catholic, Western Church, Roman Catholic Church, Church of Rome, Roman Churchthe Christian Church based in the Vatican and presided over by a pope and an episcopal hierarchy
Adjectives
(a)Roman, R.C., Romanist, romish, Roman Catholic, popish, papist, papistic, papisticalof or relating to or supporting Romanism“the Roman Catholic Church”