romanist

from 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}]

from The Collaborative International Dictionary of English v.0.48

Romanist \Ro"man*ist\, n.
   One who adheres to Romanism.
   [1913 Webster]