| CRYPTOSYSTEMS | • cryptosystems n. Plural of cryptosystem. |
| GYROCOMPASSES | • gyrocompasses n. Plural of gyrocompass. • gyro␣compasses n. Plural of gyro compass. • GYROCOMPASS n. a compass which indicates direction by the freely moving axis of a rapidly spinning wheel. |
| HYPSOMETRISTS | • HYPSOMETRIST n. a practitioner of hypsometry, the measuring the heights of places on the earth's surface. |
| PARASYMBIOSES | • PARASYMBIOSIS n. the symbiotic relationship that occurs between certain species of fungi and lichens. |
| PRESBYTISMS | • PRESBYTISM n. presbyopia. |
| PROSELYTISMS | • proselytisms n. Plural of proselytism. • PROSELYTISM n. conversion. |
| PSYCHOMETRISTS | • psychometrists n. Plural of psychometrist. • PSYCHOMETRIST n. one who practises psychometry. |
| SPYMASTERS | • spymasters n. Plural of spymaster. • SPYMASTER n. one who controls spies. |
| SUPERSYMMETRIES | • supersymmetries n. Plural of supersymmetry. • SUPERSYMMETRY n. the correspondence between fermions and bosons of identical mass that is postulated to have existed during the opening moments of the big bang and that relates gravity to the other forces of nature. |
| SUPERSYSTEM | • supersystem n. A system comprising several subsystems. • SUPERSYSTEM n. a system that is made up of systems. |
| SUPERSYSTEMS | • supersystems n. Plural of supersystem. • SUPERSYSTEM n. a system that is made up of systems. |
| SYMPATHISERS | • sympathisers n. Plural of sympathiser. • SYMPATHISER n. one who sympathises, also SYMPATHIZER. |
| SYMPIESOMETERS | • sympiesometers n. Plural of sympiesometer. • SYMPIESOMETER n. instrument for measuring pressure of a current. |
| TRYPANOSOMIASES | • trypanosomiases n. Plural of trypanosomiasis. • TRYPANOSOMIASIS n. infection with or disease caused by trypanosomes. |