- needle weir
- negative friction
- negative terminal
- neobaroque
- neogothic architecture
- neon light
- nepheline slurry
- nepheline syenite
- nerve tubes
- nesosilicate
- net product
- net structure
- netting
- network
- network topology
- neutral pressure
- new town
- new window
- nibble tile
- nice
- niche-kitchen
- nichrome wire
- nickel alloy
- natural resonance
- natural sand
- natural shake
- natural slope
- natural state
- natural subbase
- natural vibration
- natural wear
- naval
- nave
- navicular
- navigable facility
- navigation
- navigation canal
- navy blue
- neap
- nearside lane
- neck
- neck gutter
- neck molding
- necropolis
- needle
- needle apparatus
- needle dam
- needle joint
- needle key
- needle spire
- needle vibrator
- negative copy
- negative pressure
- negative reaction
- negative reinforcement
- negative source
- neighborhood
- neocene
- Neogeneous period
- neozoic
- nepheline cement
- network structure
- neural
- neutral axis
- neutral equilibrium
- neutral soil
- neutrality
- neutralize
- new city
- new document
- newel post
- newspaper table
- Newtonian loss
- next
- next window
- nibbed bolt
- niche
- nick point
- nickel
- nickel bath
- night club
- night latch
- nightmare
- nitrocellulose lacquer
- nitrogen manure
- nitrogen plant
- nivation
- no deposit
- nobel prize
- nodal
- nodal event
- nodal movement
- noise baffle
- noise barrier
- noise elimination
- noise insulation
- nominal
- nominal capacity
- nominal output
- nominative