| COMPRESSORS | • compressors n. Plural of compressor. • COMPRESSOR n. one that compresses. |
| DYSPROSIUMS | • DYSPROSIUM n. a rare-earth metal used in nuclear research. |
| IMPRESSIONS | • impressions n. Plural of impression. • impressions v. Third-person singular simple present indicative form of impression. • IMPRESSION n. a stamp, form, or figure resulting from physical contact. |
| ISOTROPISMS | • ISOTROPISM n. isotropy, also ISOTROPY. |
| MESOSPHERES | • mesospheres n. Plural of mesosphere. • MESOSPHERE n. a zone in the Earth between 400 and 670 km below the surface separating the upper mantle from the lower mantle. |
| MISPRISIONS | • misprisions n. Plural of misprision. • MISPRISION n. a wrongful act or omission; specifically a misdemeanour or failure of duty by a public official. |
| MISWORSHIPS | • misworships v. Third-person singular simple present indicative form of misworship. • MISWORSHIP v. to worship in a false way. |
| PERMISSIONS | • permissions n. Plural of permission. • PERMISSION n. the act of permitting. |
| POSTMASTERS | • postmasters n. Plural of postmaster. • POSTMASTER n. one who has charge of a station for the accommodation of travelers; one who supplies post horses. |
| PRESTISSIMO | • prestissimo adj. (Music) Extremely fast, the fastest possible tempo. • prestissimo adv. (Chiefly music) Very quickly. • PRESTISSIMO adj. (Italian) as quickly as possible. |
| PROGRESSISM | • PROGRESSISM n. sympathy with or advocacy of progress, also PROGRESSIVISM. |
| PROMISELESS | • promiseless adj. Without a promise. • PROMISELESS adj. without a promise. |
| PROSAICISMS | • prosaicisms n. Plural of prosaicism. • PROSAICISM n. the quality of being prosaic. |
| PROSTATISMS | • prostatisms n. Plural of prostatism. • PROSTATISM n. an illness or disorder associated with enlargement of the prostate. |
| ROMPISHNESS | • rompishness n. The quality of being rompish. • ROMPISHNESS n. the state of being rompish. |
| SARCOPLASMS | • sarcoplasms n. Plural of sarcoplasm. • SARCOPLASM n. the protoplasmic substance separating the fibrils in muscle fibres. |
| SPOONERISMS | • spoonerisms n. Plural of spoonerism. • SPOONERISM n. a transposition of initial sounds of spoken words, e.g. 'shoving leopard' for 'loving shepherd'. |
| SUPERSTORMS | • superstorms n. Plural of superstorm. • SUPERSTORM n. an extremely powerful storm that causes widespread devastation. |