Problem: What are the most important words?
large scale detailed road map of city with all buildings
Answer: building, city, map

Problem: What are the most important words?
A container vehicle stacked high with luggage and bags.
Answer: luggage, stack, vehicle

Problem: What are the most important words?
red deer stag takes a mud bath by wallowing in mud during the rut in autumn
Answer:
autumn, mud, rut, stag