Yes, park is playable
					...and is worth 11 points.
			
	
		
		
		
	
	Found in the following dictionaries
	Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Park" Definition
        noun
        	
		A broad, fairly level valley between mountain ranges:  the high parks of the Rocky Mountains.
		
	 
	
	    	
		A landscaped city square.
		
	 
	
	    	
		A large tract of rural land kept in its natural state and usually reserved for the enjoyment and recreation of visitors.
		
	 
	
	    	
		A piece of land with few or no buildings within or adjoining a town, maintained for recreational and ornamental purposes.
		
	 
	
	    	
		A position in an automatic transmission that disengages the gears and sets the brake so the vehicle cannot move:  put the car in park and turned off the engine.
		
	 
	
			    verb-transitive
        	
		Aerospace   To place (a spacecraft or satellite) in a usually temporary orbit.
		
	 
	
	    	
		Informal   To place or leave temporarily:  parked the baby with neighbors; parking cash in a local bank account.
		
	 
	
	    	
		To assemble (artillery or other equipment) in a military park.
		
	 
	
	    	
		To put or leave (a vehicle) for a time in a certain location.
		
	 
	
			    verb-intransitive
        	
		Slang   To engage in kissing and caressing in a vehicle stopped in a secluded spot.
		
	 
	
	    	
		To park a motor vehicle:  pulled over and parked next to the curb.
		
	 
	
			    verb
        	
	
	    	
		To bring (a vehicle) to a stop and keep standing at the edge of a public way.
		
	 
	
	    	
		To leave temporarily on a public way or in a  lot or garage.
		
	 
	
	    	
		To land and leave (as an airplane).
		
	 
	
	    	
		To establish (as a satellite) in orbit.
		
	 
	
			    biographical name
        	
		Mungo 1771–1806 Scot. explorer.
		
	 
	
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