N-O
| Negate | contredire |
| Neighbourhood | Quartier, voisinnage |
| Neighbourly | Bon voisinnage |
| Network | Réseau; Trame |
| Nocturnal | Nocturne |
| Nodding | Courbé |
| Node | noeud |
| Nomadism | Nomadisme |
| Norm | Norme |
| Northern | Septentrional |
| Notary | Notaire |
| Notwithstanding | Cependant; toutefois; Néanmoins |
| Nuisance | Nuisance |
| Office | Bureau |
| Old town | Centre historique |
| One-family housing | Maison individuelle |
| Onwnership | Propriété (droit) |
| Open space | Espace libre |
| Outdo | Surenchérir/Ecrase |
| Outer; outlying (adjectif) | Périphérique |
| Outskirt | Périphérique |
| Overlaps | se chevaucher |
| Overall plan | Plan de situation |
| Oversight | erreur surveillance |
| Overrun | Envahi; Occuper |
| Overriding | Prédominant ; primordial |
| Overwhelming | écrant; massif |
| Owner | Propriétaire |
| Owing to | en raison de |