| CLASSROOMS | • classrooms n. Plural of classroom. • CLASSROOM n. a room in which children are confined, nominally for purposes of instruction.
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| COMMISSARS | • commissars n. Plural of commissar. • COMMISSAR n. the head of a government department in the USSR.
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| CROSSBEAMS | • crossbeams n. Plural of crossbeam. • CROSSBEAM n. a beam joining other beams.
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| GLASSWORMS | • glassworms n. Plural of glassworm. • GLASSWORM n. the larva of a gnat.
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| ISOBARISMS | • ISOBARISM n. the use of isobars. | 
| ISOMERASES | • isomerases n. Plural of isomerase. • ISOMERASE n. an enzyme which speeds up the conversion of one isomeric compound to another isomeric form.
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| KISSOGRAMS | • kissograms n. Plural of kissogram. • KISSOGRAM n. a service whereby a kiss is delivered e.g. on someone's birthday by a kissogram girl, also KISSAGRAM.
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| LOSSMAKERS | • lossmakers n. Plural of lossmaker. • loss-makers n. Plural of loss-maker.
 • LOSSMAKER n. a business that makes a continual loss.
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| MASSYMORES | • massymores n. Plural of massymore. • MASSYMORE n. (Scott) a subterranean prison, also MATTAMORE.
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| MAYORESSES | • mayoresses n. Plural of mayoress. • MAYORESS n. a female mayor.
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| MISFEASORS | • misfeasors n. Plural of misfeasor. • MISFEASOR n. one who commits a misfeasance.
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| MORASSIEST | • MORASSY adj. like a morass, marshy. | 
| MOSASAURUS | • Mosasaurus prop.n. A taxonomic genus within the family Mosasauridae – a mosasaur from the Late Cretaceous of Europe, North… • MOSASAURUS n. a gigantic Cretaceous fossil pythonomorph reptile, also MOSASAUR.
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| OSTRACISMS | • ostracisms n. Plural of ostracism. • OSTRACISM n. expulsion from society.
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| RANSOMLESS | • ransomless adj. Incapable of being ransomed; without ransom. • RANSOMLESS adj. incapable of being ransomed.
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| SALESROOMS | • salesrooms n. Plural of salesroom. • SALESROOM n. a room where goods for sale, esp. at auction, are displayed, also SALEROOM.
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| SANDSTORMS | • sandstorms n. Plural of sandstorm. • sand␣storms n. Plural of sand storm.
 • SANDSTORM n. a strong wind that whips up clouds of sand, esp. in a desert.
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| SARCOSOMES | • sarcosomes n. Plural of sarcosome. • SARCOSOME n. a mitochondrion of a striated muscle fire.
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| SMASHEROOS | • smasheroos n. Plural of smasheroo. • SMASHEROO n. (colloquial) a thing of superlative quality.
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