| COOPERATOR | • cooperator n. One who cooperates; an associate. • coöperator n. Alternative spelling of cooperator. • co-operator n. Alternative spelling of cooperator. |
| COPROMOTER | • copromoter n. A joint promoter. • COPROMOTER n. a joint promoter. |
| CORPORATOR | • corporator n. (Dated) A member of a corporation, especially one of the original members. • CORPORATOR n. a member of a corporation, esp. one of the original members. |
| MOTORSPORT | • motorsport n. Auto racing. • motorsport n. Any sport involving automobiles (motor cars) other than racing; e.g. time trials. |
| ORTHOTROPY | • orthotropy n. The condition of being orthotropic. • ORTHOTROPY n. the state of being orthotropic, growing along a vertical axis. |
| OUTROOPERS | • OUTROOPER n. (obsolete) an auctioneer; the Common Crier of the City, also OUTROPER. |
| PROLOCUTOR | • prolocutor n. A spokesman, one who speaks on behalf of others. • prolocutor n. A chairman of the lower house of a convocation in the Anglican Church. • PROLOCUTOR n. a presiding officer; a chairman, esp. of the lower house of Convocation. |
| PROMONTORY | • promontory n. A high point of land extending into a body of water, headland; cliff. • promontory n. (Anatomy) A projecting part of the body. • PROMONTORY n. a high point of land or rock projecting into a body of water. |
| PROPORTION | • proportion n. (Countable) A quantity of something that is part of the whole amount or number. • proportion n. (Uncountable) Harmonious relation of parts to each other or to the whole. • proportion n. (Countable) Proper or equal share. |
| PROPROCTOR | • proproctor n. (UK) An assistant proctor in a university. • PROPROCTOR n. an assistant proctor. |
| PROTOTROPH | • prototroph n. (Biology) Any microorganism that can synthesize its nutrients from inorganic material. • PROTOTROPH n. a bacterium feeding only on inorganic matter. |
| PROVOCATOR | • provocator n. One who engages in provocation. • PROVOCATOR n. one who provokes. |
| STORMPROOF | • stormproof adj. Capable of resisting a storm. • storm-proof adj. Alternative form of stormproof. • STORMPROOF adj. proof against bad weather. |
| THORNPROOF | • thornproof adj. Resistant to tearing by thorns. • THORNPROOF adj. proof against thorns. |