Final answer:
The term 'Riviera' is the seven-letter word that describes the scenic coastal areas of Genoa, Nice, and Acapulco, associated with luxury and resort areas.
Step-by-step explanation:
The seven-letter word that describes the coastal areas surrounding the cities of Genoa, Italy; Nice, France; and Acapulco, Mexico is Riviera. The term Riviera is commonly used to refer to a beautiful, scenic coastline, especially one that is associated with luxury and sophisticated resorts. Genoa and Nice are located along the Mediterranean Sea, known for their picturesque Rivieras, whereas Acapulco is along the Pacific coast of Mexico, also boasting a stunning Riviera ideal for tourism.