| HERESIOGRAPHY | • heresiography n. A treatise on heresy. • HERESIOGRAPHY n. a study of or treatise on heresies. |
| HYDROGRAPHIES | • hydrographies n. Plural of hydrography. • HYDROGRAPHY n. the study of bodies of water. |
| HYETOGRAPHIES | • HYETOGRAPHY n. the study of rainfall distribution. |
| HYMNOGRAPHIES | • HYMNOGRAPHY n. the study of writing hymns. |
| HYPHENISATION | • HYPHENISATION n. the process of hyphenising, also HYPHENIZATION. |
| HYPOXANTHINES | • hypoxanthines n. Plural of hypoxanthine. • HYPOXANTHINE n. a purine base found in plant and animal tissues that yields xanthine on oxidation. |
| HYPSOGRAPHIES | • HYPSOGRAPHY n. the branch of geography dealing with the measurement and mapping of heights above sea level. |
| MYTHOGRAPHIES | • mythographies n. Plural of mythography. • MYTHOGRAPHY n. the descriptive study or representation of myths. |
| ONYCHOPHAGIES | • ONYCHOPHAGY n. the habit of biting one's fingernails. |
| OSTEICHTHYANS | • osteichthyans n. Plural of osteichthyan. • OSTEICHTHYAN n. a bony fish. |
| PHYSIOGRAPHER | • physiographer n. A specialist in physiography. • PHYSIOGRAPHER n. one who practises physiography. |
| PHYSIOTHERAPY | • physiotherapy n. Therapy that uses physical techniques such as massage, ultrasound, heat, and exercise. • PHYSIOTHERAPY n. physical therapy. |
| PHYTOGRAPHIES | • PHYTOGRAPHY n. descriptive botany. |
| PSYCHOMACHIES | • psychomachies n. Plural of psychomachy. • PSYCHOMACHY n. conflict of the soul. |
| PSYCHOPATHIES | • psychopathies n. Plural of psychopathy. • PSYCHOPATHY n. the state of being a psychopath. |
| RHYTHMOPOEIAS | • RHYTHMOPOEIA n. the art of composing rhythmically. |