nadir
the lowest point of something
nascent
in the process of being born or coming into existence
nebulous
vaguely defined, cloudy
nefarious
heinously villainous
negligent
habitually careless, neglectful
neophyte
someone who is young or inexperienced
nocturnal
relating to or occurring during the night
noisome
unpleasant, offensive, especially to the sense of smell
nominal
trifling, insignificant
nonchalant
having a lack of concern, indifference
nondescript
lacking a distinctive character
notorious
widely and unfavorably known
novice
a beginner, someone without training or experience
noxious
harmful, unwholesome
nuance
a slight variation in meaning, tone, expression
nurture
to assist the development of