| OPPRESSOR | • oppressor n. Someone who oppresses another or others. • OPPRESSOR n. one that oppresses. |
| PEREOPODS | • pereopods n. Plural of pereopod. • PEREOPOD n. an appendage of the pereion. |
| PHOSPHORE | • phosphore n. Archaic form of phosphor. • PHOSPHORE n. phosphorus; a phosphorescent or fluorescent substance generally, also PHOSPHOR. |
| POLYPORES | • polypores n. Plural of polypore. • POLYPORE n. a fungus with pores. |
| POROSCOPE | • poroscope n. A device for measuring permeability. • POROSCOPE n. an instrument for investigating porosity. |
| PORPOISED | • porpoised v. Simple past tense and past participle of porpoise. • PORPOISE v. to move like a porpoise; specifically (of an aircraft, esp. a seaplane) to touch the water or ground and rise again. |
| PORPOISES | • porpoises n. Plural of porpoise. • porpoises v. Third-person singular simple present indicative form of porpoise. • PORPOISE v. to move like a porpoise; specifically (of an aircraft, esp. a seaplane) to touch the water or ground and rise again. |
| POSTPONER | • postponer n. One who postpones. • POSTPONER n. one who postpones. |
| PREPOSTOR | • prepostor n. Alternative form of prepositor. • PREPOSTOR n. (Latin) the name used for a prefect in some English public schools, also PRAEPOSTOR, PREPOSITOR. |
| PROPENOLS | • PROPENOL n. a flammable gas. |
| PROPOSERS | • proposers n. Plural of proposer. • PROPOSER n. one that proposes. |
| PROPTOSES | • proptoses v. Third-person singular simple present indicative form of proptose. • PROPTOSIS n. the forward displacement of an organ, particularly the eyeball. |
| PTEROPODS | • pteropods n. Plural of pteropod. • PTEROPOD n. a small swimming mollusc, often shell-less. |
| PYROSCOPE | • pyroscope n. (Dated, physics) An early form of pyrometer used to measure high temperatures. • PYROSCOPE n. an instrument for measuring intensity of radiant heat. |
| REOPPOSED | • reopposed v. Simple past tense and past participle of reoppose. • REOPPOSE v. to oppose again. |
| REOPPOSES | • reopposes v. Third-person singular simple present indicative form of reoppose. • REOPPOSE v. to oppose again. |