nadir	noun	the point of the celestial sphere that is directly opposite the zenith and vertically downward from the observer
neophyte	noun	a new convert; proselyte
nexus	noun	a connected group or series
noisome	adjective	noxious, harmful
nosegay	noun	a small bunch of flowers; posy
nugatory	adjective	of little or no consequence; trifling, inconsequential