- hydraulic gate
- hydraulic glue
- hydraulic gress
- hydraulic hammer
- hydraulic head
- hydraulic index
- hydraulic jack
- hydraulic jump
- hydraulic monitor
- hydraulic mortar
- hydraulic potential
- hydraulic properties
- hydraulic resistance
- hydraulic section
- hydraulic support
- hydraulic vibrator
- hydrocylinder
- hydrodynamic
- hydrodynamic stability
- hydroenergizing tunnel
- hydrogen cylinder
- hypotenuse
- hyppodrome
- i-beam
- ice apron
- ice bed
- ice gate
- ice jam
- ice level
- ice pressure
- icons spacing
- ideal contraction
- identification device
- idiom
- idle blast
- idle running
- idle time
- idol
- hyperstatic structure
- hypethral
- hyphen
- hypostyle hall
- hypsography
- Hyquyst diagram
- I-shaped
- ice erosion
- ice load
- ice thrust
- illuminant
- illumination analysis
- illumination engineer
- image attributes
- image element
- image graphics
- image plane
- image screen
- imaginary load
- Imhoff cone
- imitation brick
- imitation marble
- immediate addressing
- immediate roof
- immersed
- immovable
- impact bending
- impact effect
- impact grinding
- impact loss
- impact noise
- impact pressure
- impact screen
- impact tension
- impact testing
- impact viscosity
- impair
- impalpable sand
- impassable road
- impedance coupling
- impenetrable
- imperfect frame
- imperfect well
- impermeability
- impermeability factor
- impermeable groin
- impermeableness
- impervious diaphragm
- implicit type
- imporosity
- imposing
- impound
- impounding reservoir
- impregnated wood
- impregnating bath
- impregnating compound
- impregnating vessel
- impregnation plant
- impregnator
- ignite
- igniter composition
- ignition control