la noria - water wheel, Ferris wheel, big wheel...
  nulo - invalid, null and void
  el nudo - knot, junction or crossroads,...
  la ñame - yam
  Noruega - Norway
  la negrura - blackness, darkness
  la naranja - orange (the fruit or the color)
  el novelón - a long novel, often (although not...
  nipón, nipona - Japanese
  ñoño - dull, prudish, whiny, fussy,...
  el neón - neon, neon light
  nocivo - harmful, poisonous
  el nogal - walnut, walnut tree
  nimio - trivial, insignificant
  la navaja - penknife, jackknife, razor, razor clam
  nefando - odious, abominable, unspeakable
  naciente - new, incipient, rising (said of the...
  el narcotraficante, la narcotraficante - drug dealer, drug trafficker
  el naipe - playing card
  el nailon - nylon