Z is for Zirakzigil, one of the three Mountains of Moria.  In its pinnacle was Durin's tower, and here Gandalf threw down the Balrog. 
(Complete Guide, Robert Foster). 
 
So that means I get to the pick the next theme.  How about things that were in the Silmarillion but not the Hobbit or LotR? 
(A hard one!  But don't you love a challange?)
		 
		
		
		
		
		
		
			
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				All shall be rather fond of  me and suffer from mild depression.
			  
		
		
		
		
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