- inlet
- inlet chamber
- inn
- inner
- inner bark
- inner belt
- inner flue
- inner formwork
- inner rot
- inner span
- innocent
- instantaneous fracture
- instantaneous rupture
- instruction cycle
- instrument room
- instrumentation
- insulated
- insulated flooring
- insulated panel
- insulating
- insulating cardboard
- insulating coupling
- insert
- insert key
- inserted column
- inserting text
- insertion
- insertion loss
- insertion point
- inset
- inset basin
- inside calipers
- inside door
- inside finish
- inside lining
- inside painting
- insolation
- insolation exposure
- inspect
- inspection chamber
- inspection gallery
- inspection manhole
- installation
- installation diagram
- instant configuration
- institution
- instruction
- instruction counter
- instruction model
- instruction set
- instrumentation adjustment
- insufflator
- insulant
- insulate
- insulated neutral
- insulating capacity
- insulating cement
- insulating concrete
- insulating product
- insulating property
- insulating refractory
- insulating retainer
- insulating slab
- insulating varnish
- insulation
- insulation sleeve
- insulator
- insulating gap
- insulating materials
- insulating plasterboard
- insulating washer
- insulation decking
- insulation quilt
- insulation stripping
- insulator string
- insurance policy
- intake
- intake assemble
- intake gate
- intake header
- intake hole
- intake mouth
- intake pit
- intake tunnel
- intangible asset
- integral abutment
- integral control
- integral restoration
- integral trap
- integrally cast
- integrated
- integrated area
- integrated utilization
- integration constant
- integrity test
- intellect
- intellective
- intend
- intense heat
- intense study