| APOSPORIES | • APOSPORY n. reproduction without spore formation. |
| OPPOSELESS | • opposeless adj. Not to be effectually opposed; irresistible. • OPPOSELESS adj. (Shakespeare) not to be opposed; irresistible. |
| OPPRESSION | • oppression n. The exercise of authority or power in a burdensome, cruel, or unjust manner. • oppression n. The act of oppressing, or the state of being oppressed. • oppression n. A feeling of being oppressed. |
| OPPRESSORS | • oppressors n. Plural of oppressor. • OPPRESSOR n. one that oppresses. |
| PHOSPHORES | • phosphores n. Plural of phosphore. • PHOSPHORE n. phosphorus; a phosphorescent or fluorescent substance generally, also PHOSPHOR. |
| PHOTOPSIES | • photopsies n. Plural of photopsy. • PHOTOPSY n. the appearance of light flashes due to retinal irritation, also PHOTOPSIA. |
| POROSCOPES | • poroscopes n. Plural of poroscope. • POROSCOPE n. an instrument for investigating porosity. |
| POSTPERSON | • postperson n. (Uncommon) A letter carrier of any gender. • POSTPERSON n. a postman or postwoman. |
| POSTPONERS | • postponers n. Plural of postponer. • POSTPONER n. one who postpones. |
| PREPOSTORS | • prepostors n. Plural of prepostor. • PREPOSTOR n. (Latin) the name used for a prefect in some English public schools, also PRAEPOSTOR, PREPOSITOR. |
| PROPOLISES | • PROPOLIS n. (Greek) a resinous substance used as a cement by bees. |
| PROSPEROUS | • prosperous adj. Characterized by success. • prosperous adj. Well off; affluent. • prosperous adj. Favorable. |
| PSEUDOPODS | • pseudopods n. Plural of pseudopod. • PSEUDOPOD n. a process protruding from the cell of a protozoan, etc., used for movement or feeding. |
| PYROSCOPES | • pyroscopes n. Plural of pyroscope. • PYROSCOPE n. an instrument for measuring intensity of radiant heat. |