| nonchalant | Feeling or appearing casually calm and relaxed; not displaying anxiety, interest, or enthusiasm | |
| nondescript | Lacking distinctive or interesting features or characteristics | |
| nonplussed | Surprised and confused so much that they are unsure how to react | |
| nontrivial | Significant or not simple; requiring serious thought or effort | |
| normative | Establishing, relating to, or deriving from a standard or norm, especially of behavior | |
| nostalgia | A sentimental longing or wistful affection for a period in the past. | |
| nostrum | A medicine, especially one that is not considered effective, prepared by an unqualified person. | |
| notorious | Famous or well known, typically for some bad quality or deed | |
| novel | A fictitious prose narrative of book length, typically representing character and action with some degree of realism | |
| novitiate | The period or state of being a novice, especially in a religious order. | |