| DORTOUR | • dortour n. Alternative form of dorter. • DORTOUR n. (archaic) a dormitory, also DORTER. |
| ORATORS | • orators n. Plural of orator. • ORATOR n. one that orates. |
| ORATORY | • oratory n. A private chapel or prayer room. • oratory n. A Roman Catholic chapel; a building for public or private worship that is not a parish church. • oratory n. (Specifically) A Catholic church belonging to the Oratory of Saint Philip Neri. |
| ORTHROS | • orthros n. (Christianity) The divine office or service at dawn of the Orthodox Christian Church. • ORTHROS n. (Greek) one of the Greek canonical hours. |
| OUTROAR | • outroar v. (Transitive) To roar louder than. • outroar n. An uproar. • OUTROAR v. (Shakespeare) to roar louder than. |
| PROCTOR | • proctor n. (US) A person who supervises students as they take an examination, in the United States at the college/university… • proctor n. (UK) An official at any of several older universities. • proctor n. (Britain, law) A legal practitioner in ecclesiastical and some other courts. |
| PROTORE | • PROTORE n. an earlier unenriched form of a mineral ore. |
| REDROOT | • redroot n. Any of several plants with red roots, such as the New Jersey tea (Ceanothus americanus), the gromwell… • REDROOT n. a plant with a red root and red sap, and bearing a pretty, white flower in early spring, aka puccoon, bloodroot. |
| ROBOTRY | • robotry n. Robotics. • ROBOTRY n. the science of robots. |
| ROOSTER | • rooster n. (North America, Kent, Australia, New Zealand) A male domestic chicken (Gallus gallus domesticus) or… • rooster n. A bird or bat which roosts or is roosting. • rooster n. (Figuratively, obsolete slang) An informer. |
| ROOTERS | • rooters n. Plural of rooter. • ROOTER n. a vocal supporter. |
| ROOTIER | • rootier adj. Comparative form of rooty: more rooty. • ROOTY adj. full of roots. |
| ROTATOR | • rotator n. One who or that which rotates. • rotator n. (Anatomy) A muscle by which a joint can be rotated. • rotator n. A revolving reverberatory furnace. |
| TOREROS | • toreros n. Plural of torero. • TORERO n. (Spanish) a bullfighter on foot. |
| TORPORS | • torpors n. Plural of torpor. • TORPOR n. (Latin) mental or physical inactivity. |
| TROOPER | • trooper n. (Military) A soldier of private rank in cavalry or armour. • trooper n. (Military) A cavalry horse; a charger. • trooper n. (Military) A soldier. |