Captain is related to Mate. Mate is related to Soul. Soul is the opposite of Clay. Clay is the opposite of Spirit. 
Pound is a synonym of Sharp. Sharp is the opposite of Legitimate. Legitimate is a synonym of Just. 
Captain <--RelatedTo--> Mate <--RelatedTo--> Soul <--Antonym--> Clay <--Antonym--> Spirit 
Pound <--Synonym--> Sharp <--Antonym--> Legitimate <--Synonym--> Just 