Yes, crowns is a Scrabble word!

Verb

1. Invest with regal power; enthrone

2. Be the culminating event

3. Form the topmost part of

4. Put an enamel cover on

Noun

1. The Crown (or the reigning monarch) as the symbol of the power and authority of a monarchy

2. The part of a tooth above the gum that is covered with enamel

3. A wreath or garland worn on the head to signify victory

4. An ornamental jeweled headdress signifying sovereignty

5. The part of a hat (the vertex) that covers the crown of the head

6. An English coin worth 5 shillings

7. The upper branches and leaves of a tree or other plant

8. The top or extreme point of something (usually a mountain or hill)

9. The award given to the champion

10. The top of the head

11. (dentistry) dental appliance consisting of an artificial crown for a broken or decayed tooth

12. The center of a cambered road