- harbour facilities
- harbour railway
- hard aggregate
- hard asphalt
- hard carbide
- hard copy
- hard hat
- hard head
- hard limestone
- hard news
- hard plate
- hard putty
- hard steel
- hard top
- hard wood
- hard-wired
- hardboard siding
- harden
- hardened concrete
- hardened steel
- hardening
- hardening constant
- hardening limit
- hardening regime
- hardness
- hardness number
- harm
- harmonic series
- harmony
- harsh consistency
- harsh mix
- hash algorithm
- hassock
- hatchway
- haul road
- haulage
- haulage level
- haulage plane
- hauler
- hauling winch
- haunch
- haunched
- hay loft
- hay storehouse
- haydite concrete
- hazardous
- hazardous location
- hazards
- haze
- head
- head bay
- head excavation
- head fall
- head flow
- head jamb
- head lap
- head load
- head protection
- head tank
- head tower
- head wall
- head-bolt
- head-phone
- headache
- headed stud
- header
- header brick
- header course
- header file
- header information
- heat endurance
- heat engineer
- heat exchanger
- heat expansion
- heat flowrate
- heat gain
- heat generator
- heat input
- heat insulator
- heat intake
- heat jacket
- heat leakage
- heat loss
- heat losses
- heat meter
- heat output
- heat pipeline
- heat pump
- heat ray
- heat receiver
- heat reception
- heat recovery
- heat rejection
- heat release
- heat resistance
- heat sink
- heat storage
- heat supply
- heat treatment
- heat utilization