photoelectron/ˌfohtoh·iʹlektron/ noun

• hypothecate
• hypothermia
• hypothesis
• hypothesize
• hypothetical
• hypothyroidism
• hypotonic
• hypoventilation
• hypovolaemia
• hypoxia
• hyps-
• hypsilophodont
• hypso-
• hypsography
• hypsometer
• hyraces
• hyracotherium
• hyrax
• hyssop
• hyster-
• hysterectomy
• hysteresis
• hysteria
• hysteric
• hysterical