| anancasm | (noun) An obsolete term for ritualistic act or sequence of acts performed by a person with obsessive-compulsive neurosis. | - |
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| blepharospasm | (noun) spasm of the eyelid muscle resulting in closure of the eye | - |
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| bronchospasm | (noun) a spasm of the bronchi that makes exhalation difficult and noisy; associated with asthma and bronchitis | - |
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| cardiospasm | (noun) a spasm of the cardiac sphincter (between the esophagus and the stomach); if the cardiac sphincter does not relax during swallowing the passage of food into the stomach is obstructed | - |
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| cataplasm | (noun) a medical dressing consisting of a soft heated mass of meal or clay that is spread on a cloth and applied to the skin to treat inflamed areas or improve circulation etc. | Synonyms: plaster, poultice |
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| chasm | (noun) a deep opening in the earth's surface | - |
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| chiasm | (noun) an intersection or crossing of two tracts in the form of the letter X | Synonyms: chiasma, decussation |
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| chiliasm | (noun) belief in the Christian doctrine of the millennium mentioned in the Book of Revelations | Synonyms: millenarianism, millenarism, millenniumism |
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| cytoplasm | (noun) the protoplasm of a cell excluding the nucleus; is full of proteins that control cell metabolism | Synonyms: cytol |
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| ectoplasm | (noun) the outer granule-free layer of cytoplasm | - |
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| (noun) (spiritualism) a substance supposed to emanate from the body of the medium during a trance | - |
| endoplasm | (noun) the inner portion of the cytoplasm of a cell | - |
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| enthusiasm | (noun) overflowing with eager enjoyment or approval | Synonyms: ebullience, exuberance |
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| (noun) a lively interest | - |
| (noun) a feeling of excitement | - |
| fantasm | (noun) something existing in perception only | Synonyms: apparition, phantasm, phantasma, phantom, shadow |
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| (noun) a ghostly appearing figure | Synonyms: apparition, phantasm, phantasma, phantom, specter, spectre |
| foodgasm | (noun) An extreme feeling of pleasure caused by seeing food | - |
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| graphospasm | (noun) muscular spasms of thumb and forefinger while writing with a pen or pencil | Synonyms: writer's cramp |
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| hyaloplasm | (noun) the clear nongranular portion of the cytoplasm of a cell | Synonyms: ground substance |
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| iconoclasm | (noun) the orientation of an iconoclast | - |
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| karyoplasm | (noun) the protoplasm that constitutes the nucleus of a cell | Synonyms: nucleoplasm |
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| laryngospasm | (noun) a closure of the larynx that blocks the passage of air to the lungs | - |
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| miasm | (noun) unhealthy vapors rising from the ground or other sources | Synonyms: miasma |
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| (noun) an unwholesome atmosphere | Synonyms: miasma |
| neoplasm | (noun) an abnormal new mass of tissue that serves no purpose | Synonyms: tumor, tumour |
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| nucleoplasm | (noun) the protoplasm that constitutes the nucleus of a cell | Synonyms: karyoplasm |
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| orgasm | (noun) the moment of most intense pleasure in sexual intercourse | Synonyms: climax, coming, sexual climax |
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| phantasm | (noun) something existing in perception only | Synonyms: apparition, fantasm, phantasma, phantom, shadow |
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| (noun) a ghostly appearing figure | Synonyms: apparition, fantasm, phantasma, phantom, specter, spectre |
| piroplasm | (noun) minute parasite of red blood cells of mammals transmitted by a tick and causing diseases of domestic animals | - |
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| plasm | (noun) the protoplasm of the germ cells that contains chromosomes and genes | Synonyms: germ plasm |
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| (noun) the colorless watery fluid of the blood and lymph that contains no cells, but in which the blood cells (erythrocytes, leukocytes, and thrombocytes) are suspended | Synonyms: blood plasma, plasma |
| pleonasm | (noun) using more words than necessary | - |
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| protoplasm | (noun) the substance of a living cell (including cytoplasm and nucleus) | Synonyms: living substance |
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| sarcasm | (noun) witty language used to convey insults or scorn | Synonyms: caustic remark, irony, satire |
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| sarcoplasm | (noun) the cytoplasm of a striated muscle fiber | - |
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| spasm | (noun) (pathology) sudden constriction of a hollow organ (as a blood vessel) | - |
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| (noun) a painful and involuntary muscular contraction | Synonyms: cramp, muscle spasm |