| Hadephobia | fear of hell (see list of phobias) |
| Haemataulics | study of movement of blood through blood vessels (see list of branches of science) |
| Hagiology | study of saints (see list of branches of science) |
| Hagiophobia | fear of saints or holy things (see list of phobias) |
| Halieutics | study of fishing (see list of branches of science) |
| Halitophobia | fear of bad breath (see list of phobias) |
| Hamartiology | study of sin (see list of branches of science) |
| Hamartophobia | fear of sinning (see list of phobias) |
| Hans Lipperhey | German-Dutch spectacle-maker and inventor of telescope |
| Haphephobia | fear of being touched (see list of phobias) |
| Haptephobia | fear of being touched (see list of phobias) |
| Harmonics | study of musical acoustics (see list of branches of science) |
| Harpaxophobia | fear of being robbed (see list of phobias) |
| Hedonics | study of pleasure (see list of branches of science) |
| Hedonophobia | fear of feeling pleasure (see list of phobias) |
| Helcology | study of ulcers (see list of branches of science) |
| Heliology | study of the sun (see list of branches of science) |
| Heliophobia | fear of the sun (see list of phobias) |
| Helioseismology | study of sun's interior by observing its surface oscillations (see list of branches of science) |
| Hellenologophobia | fear of Greek terms or complex scientific terminology (see list of phobias) |
| Helminthology | study of worms (see list of branches of science) |
| Helminthophobia | fear of being infested with worms (see list of phobias) |
| Hemaphobia | fear of blood (see list of phobias) |
| Hematology | study of blood (see list of branches of science) |
| Hematophobia | fear of blood (see list of phobias) |
| Hemodynamics | study of the dynamics behind blood circulation (see list of branches of science) |
| Hemophobia | fear of blood (see list of phobias) |
| Hepatology | study of liver, gallbladder, biliary tree, and pancreas (see list of branches of science) |
| Heptadecaphobia | fear of the number 17 (see list of phobias) |
| Heptadekaphobia | fear of the number 17 (see list of phobias) |
| Heredity | study of passing of traits from parents to offspring (see list of branches of science) |
| Hereiophobia | fear of challenges to official doctrine or of radical deviation (see list of phobias) |
| Heresiology | study of heresies (see list of branches of science) |
| Heresyphobia | fear of challenges to official doctrine or of radical deviation (see list of phobias) |
| Hermeology | study of Mercury (see list of branches of science) |
| Herpetology | study of reptiles and amphibians (see list of branches of science) |
| Herpetophobia | fear of reptiles or creepy, crawly things. (see list of phobias) |
| Heterophobia | fear of the opposite gender (see list of phobias) |
| Hexakosioihexekontahexaphobia | fear of the number 666 (see list of phobias) |
| Hierology | study of sacred matters (see list of branches of science) |
| Hierophobia | fear of priests or sacred things (see list of phobias) |
| Hippiatrics | study of diseases of horses (see list of branches of science) |
| Hippology | study of horses (see list of branches of science) |
| Hippophobia | fear of horses (see list of phobias) |
| Hippopotomonstrosesquipedaliophobia | fear of long words (see list of phobias) |
| Histology | study of the tissues of organisms (see list of branches of science) |
| Histopathology | study of changes in tissue due to disease (see list of branches of science) |
| Historiography | study of writing history (see list of branches of science) |
| Historiology | study of history (see list of branches of science) |
| Hobophobia | fear of bums or beggars (see list of phobias) |
| Hodophobia | fear of road travel (see list of phobias) |
| Homichlophobia | fear of fog (see list of phobias) |
| Homilophobia | fear of sermons (see list of phobias) |
| Hominophobia | fear of men (see list of phobias) |
| Homophobia | fear of sameness, monotony or of homosexuality or of becoming homosexual (see list of phobias) |
| Hoplology | study of human combative behavior and performance (see list of branches of science) |
| Hoplophobia | fear of firearms (see list of phobias) |
| Hormephobia | fear of shock (see list of phobias) |
| Horology | study of time measurement (see list of branches of science) |
| Horticulture | study of gardening (see list of branches of science) |
| Hyalophobia | fear of glass (see list of phobias) |
| Hydrargyophobia | fear of mercurial medicines (see list of phobias) |
| Hydrobiology | study of aquatic organisms (see list of branches of science) |
| Hydrodynamics | study of movement in liquids (see list of branches of science) |
| Hydrogeology | study of ground water (see list of branches of science) |
| Hydrography | study of investigating bodies of water (see list of branches of science) |
| Hydrokinetics | study of motion of fluids (see list of branches of science) |
| Hydrology | study of water resources (see list of branches of science) |
| Hydrometeorology | study of atmospheric moisture (see list of branches of science) |
| Hydropathy | study of treating diseases with water (see list of branches of science) |
| Hydrophobia | fear of water (see list of phobias) |
| Hydrophobophobia | fear of rabies (see list of phobias) |
| Hydrostatics | study of fluids behaviour at rest (see list of branches of science) |
| Hyelophobia | fear of glass (see list of phobias) |
| Hyetology | study of rainfall (see list of branches of science) |
| Hygiastics | study of health and hygiene (see list of branches of science) |
| Hygienics | study of sanitation; health (see list of branches of science) |
| Hygiology | study of cleanliness (see list of branches of science) |
| Hygrometry | study of humidity (see list of branches of science) |
| Hygrophobia | fear of liquids, dampness, or moisture (see list of phobias) |
| Hygroscopy | study of humidity (see list of branches of science) |
| Hylephobia | fear of materialism or the fear of epilepsy (see list of phobias) |
| Hylophobia | fear of forests (see list of phobias) |
| Hymnography | study of writing hymns (see list of branches of science) |
| Hymnology | study of hymns (see list of branches of science) |
| Hypegiaphobia | fear of responsibility (see list of phobias) |
| Hypengyophobia | fear of responsibility (see list of phobias) |
| Hypnology | study of sleep; study of hypnosis (see list of branches of science) |
| Hypnophobia | fear of sleep or of being hypnotized (see list of phobias) |
| Hypsiphobia | fear of height (see list of phobias) |
| Hypsography | study of measuring heights (see list of branches of science) |
| |
|
|
|
