Simple Examples:
* Friends: "The secret was shared among friends."
* Trees: "The bird built its nest among the trees."
* Books: "I found the book I was looking for among the many on the shelf."
More Complex Examples:
* Challenges: "Success is often found among the greatest challenges."
* Stars: "The spaceship navigated among the stars."
* Differences: "There are many differences among the candidates."
Abstract Nouns:
* Ideas: "The artist's ideas were unique among his peers."
* Memories: "There were many happy memories among the old photos."
* Responsibilities: "Leadership is often found among those willing to take on the most responsibilities."
The key is that the noun needs to represent something that can be part of a group or collection.