(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) house organ
(n) housekeeper
(n) household
(n) house mannequin
(n) sales clerk in a fancy boutique clothing store (wasei: house mannequin)
(n) Japanese maple (tree) (Acer japonicum)
(n) hazard map
(n) hazard lamp
(n) (uk) northern wheatear (Oenanthe oenanthe)
(n) (uk) jungle crow (Corvus macrorhynchos)
(n) (uk) black guillemot (Cepphus grylle)
tystie
(n) (uk) ringed plover (Charadrius hiaticula)