geo	earth
graph	write
hemo	blood
herb	plant
hydro	water
geocentric	relating to or measured from the Earth's center
geography	the study of the earth and its features
geology	the science that deals with the physical history of the earth
geophone	an instrument for detecting vibrations passing through rocks, soil, or ice
graphic	of or relating to written or pictorial representation.
autograph	a person's own signature or handwriting
graphite	a very common mineral that is used in lead pencils
bibliography	the works or a list of the works referred to in a text
hemoglobin	an organic molecule that carries oxygen in the blood
hemophilia	blood which can't be controlled
hemostat	an instrument or agent used to compress or treat bleeding vessels
hemodynamic	relating to or functioning in the mechanics of blood circulation
herbaceous	of, pertaining to, or characteristic of an herb; herblike
herbalist	a person who collects or deals in herbs
herbivorous	feeding on plants; plant-eating
herbicide	an agent used to destroy or inhibit plant growth
hydrophobia	an abnormal fear of water
hydrate	to supply water in order to restore or maintain fluid balance
hydroghen	a gas that combines chemically with oxygen to form water
dehydrate	to remove water from