hard - high
- headpiece
- headroom
- heads
- headstock
- headwater
- headwork
- heap
- heap up
- hearing
- hearing aid
- hearse
- heart check / shake
- heart cut
- heart rot
- heart; heartwood
- hearth
- hearth furnace
- heat
- heat absorbtion
- heat abstraction
- heat accumulator / retainer
- heat affected zone
- heat ag(e) ing
- heat application
- heat baffle
- heat balance (sheet)
- heat budget
- heat capacity
- heat carrier
- heat colours
- heat conductance
- heat conductor
- heat consumption
- heat content
- heat convection
- heat conversion factor
- heat crack
- heat density
- heat deperdition
- heat dissipation
