Select O O ANTIPHONS OATH OATH AGAINST MODERNISM OB OBADIAH OBED OBEDIENCE OBEDIENTIAL POTENCY OBEDIENTIARIES OBEDIENTIARY OBELISK, VATICAN OBERAMMERGAU OBEX OBJECT OBJECTIVE OBJECTIVE END OBJECTIVE GUILT OBJECTIVE END OBJECTIVE MORALITY OBJECTIVITY OBLATE, LAY OBLATES OBLATIONS OBLIGATION OBLIGATION, CLERICAL OBLIGATORY SIGN OBREPTION OBSCENITY OBSCURANTISM OBSERVANCE OBSERVANTINES OBSESSION OBSESSION, DIABOLICAL OBSTINACY OCCAMISM OCCAM'S RAZOR OCCASION OCCASIONALISM OCCASION OF SIN OCCULT OCCULTISM OCCUPANCY OCTAVES ODIUM THEOLOGICUM ODOR OF SANCTITY OFF OFFERING COMMUNION OFFERTORY OFFICE, DIVINE OFFICE, ECCLESIASTICAL OFFICE, LOSS OF OFFICE OF READINGS OFFICIAL SECRET OIL OF CATECHUMENS OIL OF SAINTS OIL OF THE SICK OIL STOCK OLD AGE OLD CATHOLICS OLD LAW OLD TESTAMENT OLEA SANCTA OLEUM CATECHUMENORUM OLEUM INFIRMORUM OLIVE BRANCH OLIVETANS OMEGA OMEN OMISSION OMN OMNIPOTENCE OMNIPRESENCE OMNISCIENCE OMOPHORION OMRI ONAN ONANISM ONE ONESIMUS ONTOGENESIS ONTOLOGISM ONTOLOGY OPEN PLACEMENT OPERATING GRACE OPERATIVE HABIT OPINION OPPORTUNITY OPPRESSION OF THE POOR OPTATAM TOTIUS OPTIMA INTERPRES LEGUM OPTIMISM OPTIONAL CELIBACY OPTIONAL MEMORIAL OPUS DEI OPUS DEI O.R. OR ORATE FRATRES ORATIO IMPERATA ORATION ORATORIANS ORATORIO ORATORY ORD ORDER ORDER, RELIGIOUS ORDER OF CHARITY ORDERS, ANGLICAN ORDERS, SACRAMENT OF ORDERS OF KNIGHTHOOD ORDINAL ORDINARIATE, MILITARY ORDINARY ORDINARY CARE ORDINARY JURISDICTION ORDINARY MEANS ORDINARY POWER ORDINATION ORDINEM BAPTISMI ORDINIS BAPTISMI ADULTORUM ORDO ORDO CELEBRANDI MATRIMONIUM ORDO SYNODI OREMUS ORGAN ORGANIC ARTICLES ORGANIC UNIT ORIENTALIUM ECCLESIARUM ORIENTATION ORIGENISM ORIGIN ORIGINAL JUSTICE ORIGINAL SIN OROPA ORPHREY OR. ORAT. ORTHODOXY ORTHOGENESIS ORTHOLOGY ORTHOPHONY ORTHOPRAXIS O.S. O SALUTARIS HOSTIA OSCULATORIUM OSEE OSSERVATORE ROMANO, L’ OSSUARY OSTENSORIUM OSTIARIUS O.T. OUR FATHER OUR LADY OUR LADY OF RANSOM SCAPULAR OUR LORD OVERPOPULATION OWNERSHIP OX OXFORD MOVEMENT OXON