neglect, overlook, disregard, and contemn [contemn = despise]
nice, finical, effeminate, and silly [finical = Finicky]
niggardly, close, miserly, and parsimonious [parsimonious = Excessively frugal]
noble, pure, exalted, and worthy
nonsense, trash, twaddle, and rubbish
novel, recent, rare, and unusual
noxious, unwholesome, mischievous, and destructive
O
obdurate, unfeeling, callous, and obstinate
obedient, respectful, dutiful, and submissive