The Collaborative International Dictionary of English v.0.48:
Romanist \Ro"man*ist\, n. One who adheres to Romanism. [1913 Webster]WordNet (r) 3.0 (2006):
Romanist adj 1: of or relating to or supporting Romanism; "the Roman Catholic Church" [syn: Roman, R.C., Romanist, romish, Roman Catholic, popish, papist, papistic, papistical]