noble
noble-gas
noctilucent
nocturnal
nod
nodal
nodding
node
node-to-datum
nodical
  nodular
nodule
no-dulizing
no-failure
no-feathering
no-flapping
no-go
noise
noise-cancelling
noiseless
noise-modulated

    nodular cast iron

     магниевый чугун

     чугун с шаровидным графитом