Puzzle is related to Game. Game is related to Base. Base is a synonym of Basis. 
Efficient is a synonym of Effective. Effective is related to Powerful. Powerful is related to Strong. Strong is related to Tank. 
Puzzle <--RelatedTo--> Game <--RelatedTo--> Base <--Synonym--> Basis 
Efficient <--Synonym--> Effective <--RelatedTo--> Powerful <--RelatedTo--> Strong <--RelatedTo--> Tank 