Rack is a synonym of Sack. Sack is a synonym of Dismiss. Dismiss is a synonym of Ignore. 
Degree is related to Piece. Piece is related to Bullet. Bullet is related to Rifle. 
Rack <--Synonym--> Sack <--Synonym--> Dismiss <--Synonym--> Ignore 
Degree <--RelatedTo--> Piece <--RelatedTo--> Bullet <--RelatedTo--> Rifle 