Tighten is related to Twist. Twist is related to Removal. Withdrawal is a type of Removal. Withdrawal is derived from Withdraw. 
Gasoline is a synonym of Gas. Gas is a synonym of Big. Big is related to Speech. 
Tighten <--RelatedTo--> Twist <--RelatedTo--> Removal <--IsA-- Withdrawal --DerivedFrom--> Withdraw 
Gasoline <--Synonym--> Gas <--Synonym--> Big <--RelatedTo--> Speech 