What do the following words have in common?

1. Beauty

2. Life

3. Energy

4. Supply

5. Motion

6. Series

 

Answer:

 

Each word can be preceded by a related word:

 

1. Timeless beauty

2. Eternal life

3. Boundless energy

4. Unlimited supply

5. Perpetual motion

6. Infinite series

 

Credit:

Bob Frank