(n) (comp) hard hyphen
(n) hierarchy
(n) Artemisia sieversiana
(n) hieroglyph
hieroglyphic
(n) (comp) high-end machine
(n) high culture
(n) high-key tone
(n) high quality
(n) (comp) hijacker
(n) high jump
(n) Heisenberg
(n) high society
(n) (comp) HyTelnet
(n) (1) high tension (as in electronics, etc.)
(2) excited
enthusiastic
(n) hydrangea
(n) hydroquinone
(n) (comp) hypercard
(n) (comp) hyperlink
(n) (comp) hypertext
(n) (comp) hypermedia
(n) hi-fi equipment
(n) hybridoma
(n) hybrid vehicle (e.g. electric and gasoline)
(n) hybridoma
(n) hitchhiker
(n) runner's high
(n) shochu high-ball
(n) (comp) information highway
(n) (comp) information (super)highway
(n) Alzheimer disease