Leg is related to Attractive. Attractive is the opposite of Ugly. Ugly is related to Duck. Duck is related to Similar. 
King is related to Rank. Rank is related to Score. 
Leg <--RelatedTo--> Attractive <--Antonym--> Ugly <--RelatedTo--> Duck <--RelatedTo--> Similar 
King <--RelatedTo--> Rank <--RelatedTo--> Score 