| HYMNOGRAPHIES | • HYMNOGRAPHY n. the study of writing hymns. |
| HYPERSTHENIAS | • hypersthenias n. Plural of hypersthenia. • HYPERSTHENIA n. a morbid condition marked by excessive excitement of all the vital phenomena. |
| HYPHENISATION | • HYPHENISATION n. the process of hyphenising, also HYPHENIZATION. |
| HYPOCHONDRIAS | • hypochondrias n. Plural of hypochondria. • HYPOCHONDRIA n. suffering from imaginary illness. |
| HYPOGNATHISMS | • HYPOGNATHISM n. the state of being hypognathous. |
| HYPOXANTHINES | • hypoxanthines n. Plural of hypoxanthine. • HYPOXANTHINE n. a purine base found in plant and animal tissues that yields xanthine on oxidation. |
| ICHTHYOFAUNAS | • ichthyofaunas n. Plural of ichthyofauna. • ICHTHYOFAUNA n. the fish life of region. |
| ICHTHYOPSIDAN | • ICHTHYOPSIDAN n. a member of the Ichthyopsida, amphibians, fishes and fishlike vertebrates, also ICHTHYOPSID. |
| NIGHTMARISHLY | • nightmarishly adv. In a nightmarish manner. • NIGHTMARISH adv. like a nightmare, also NIGHTMARY. |
| ONYCHOPHAGIES | • ONYCHOPHAGY n. the habit of biting one's fingernails. |
| ONYCHOPHAGIST | • onychophagist n. (Rare) A person who bites his or her fingernails. • ONYCHOPHAGIST n. one who bites their fingernails. |
| OSTEICHTHYANS | • osteichthyans n. Plural of osteichthyan. • OSTEICHTHYAN n. a bony fish. |
| PHYCOXANTHINS | • PHYCOXANTHIN n. a yellow pigment found in diatoms, brown seaweeds etc. |
| PHYSHARMONICA | • PHYSHARMONICA n. an early form of harmonium. |
| PHYSICIANSHIP | • physicianship n. The role or position of a physician. • PHYSICIANSHIP n. the office of physician. |
| PSYCHASTHENIA | • psychasthenia n. (Dated) A psychological disorder characterized by phobias, obsessions, compulsions, or excessive anxiety. • PSYCHASTHENIA n. an incapacity to resolve doubts/uncertainties or to resist obsessions/compulsions that one knows are irrational. |
| PSYCHASTHENIC | • psychasthenic adj. Affected with, or relating to, psychasthenia. • psychasthenic n. An individual who has psychasthenia. • PSYCHASTHENIC adj. relating to psychasthenia. |
| RHYTHMISATION | • rhythmisation n. Alternative form of rhythmization. • RHYTHMISATION n. the process of rhythmising, also RHYTHMIZATION. |
| YACHTSMANSHIP | • yachtsmanship n. The skill or art of sailing a yacht. • YACHTSMANSHIP n. the art of sailing a yacht. |