Bullet is related to Pen. Pen is the opposite of Close. Close is similar to Short. Short is related to Article. 
Beg is related to Plea. Plea is related to Term. Term is related to Fuel. 
Bullet <--RelatedTo--> Pen <--Antonym--> Close <--SimilarTo--> Short <--RelatedTo--> Article 
Beg <--RelatedTo--> Plea <--RelatedTo--> Term <--RelatedTo--> Fuel 