- herpes simplex 1
- hans geiger
- holbein the elder
- holbein the younger
- hyperpotassaemia
- hyperplatycmeric
- highlands of scotland
- high level source code
- humpty
- hans albrecht bethe
- hows that%3F
- heroica puebla de zaragoza
- hostilely
- herbert
- hernan cortes
- hernan cortez
- hernando cortes
- Homo sapiens sapiens
- histidine loading test
- histidinuria
- histicoytic granuloma
- hysterical manifestation
- hysterical paralysis
- heparinase
- hepar lobatum
- having neither beginning nor end
- hipparchus
- horned rattlesnake
- hiring freeze
- honduran
- hydroxymethyl
- herschel
- huxleian
- hodgkin's disease
- heinlein
- hawkyns
- hen yard
- heat lamp
- heterodont
- hypsiconch
- helmut schmidt
- heloderma horridum
- hypothalamotegmental tract
- having a form
- horace greeley
- hominy grits
- hologenesis
- heat resistance test
- hank aaron
- hypopituiary