- Fluviology : The Study of water courses
- Gastroenterology : The study of stomach
- Genesiology : The study of reproduction and heredity
- Geochronology : The study of measuring geological time
- Geology : The study of earth’s crust
- Glaciology : The study of ice ages and glaciations
- Graminology : The study of grasses
- Gynaecology : The study of women’s physiology
- Haematology : The study of blood chemistry
- Heliology : The science of the sun
- Helioseismology : The study of sun’s interior by observing its surface oscillations
- Helminthology : The study of parasitic worms
- Hepatology : The study of liver
- Herpetology : The study of reptiles and amphibians
- Histology : The study of tissue of organisms
- Histopathology : The study of changes in tissue due to diseases
- Hormonology : The study of hormones
- Horology : The science of time measurement
- Hydrobiology : The study of aquatic organisms
- Hydrogeology : The study of ground water & its effects
- Hydrology : The study of water resources
- Hydrometerology : The study of atmospheric moisture
- Hyetology : The science of rainfall
- Hygrology : The study of humidity
- Hypnology : The study of sleep or hypnosis
- Lamatology : The study of remedies
- Ichnology : The science of fossilised footprints
- Ichthyology : The study of fish
- Ideology : The science of ideas
- Immunology : The study of bodies immune system
- Immunopathology : The study of immunity to disease
- Insectology : The study of insects
- Iridology : The study of the iris & its diseases
- Karyology : The study of cell nuclei & chromosomes
- Kinesiology : The study of interrelationship of the physiological processes and anatomy of the human body with respect to movement
- Koniology : The study of atmospheric pollutants and dust & its effect on plants & animals
- Kymatology : The study of wave motion of fluids
- Lepidopterology : The study of butterflies and moths
- Lichenology : The study of lichens
- Limnobiology : The study of freshwater ecosystem
- Lithology : The study of rocks
- Malacology : The study of molluscs
- Mastology : The study of mammals
- Mereology : The study of the relations between parts & wholes
- Metapschycology : The study of nature of mind
- Meterology : The study of weather
- Metrology : The science of weights and measures
- Microbiology : The study of microscopic organisms
- Microclimatology : The study of local climate
- Microphytology : The study of very small plant life
- Mineralogy : The study of minerals
- Molinology : The study of mills and other mechanical devices which use natural kinetic energy like wind, water for power
- Morphology : The study of forms and structures
- Muscology : The study of mosses
- Mycology : The study of fungus
- Myology : The study of muscles
- Myrmecology : The study of ants