Night: 1. A possible Association is with ‘yin’ of Ying-yang.
2. Symbolises darker aspect of self.
3. Associated with fear.
4. Dark night of the soul.

Numb: 1. Feeling of futility.
2. Mentally and emotionally disconnected from something.

Nun: Denotes qualities associated to nun, such as spirituality,  reclusiveness.

Nurse: Associated with caring and healing.

Nail : This symbol could possibly symbolise any of the following:
1. Accurate about something, as in nailing down or hitting the nail.
2. Tough as in hard as nail.
3. Nailing somebody or something.

Nausea, vomit: Associated with rejection and fear of particular experience, event or issue.

Nest could possibly represent the following:
1. A place or zone of security and comfort.
2. Leaving a nest may mean moving out of one’s secure zone.
3. Building a nest may mean settling down.

New year : May signify the beginning of a cycle.

Newspaper : This symbol may be about receiving information, messages or ideas.