Ugly is the opposite of Moral. Moral is related to Bit. Bit is a synonym of Moment. Moment is related to Minute. 
Sell is the opposite of Pay. Pay is related to Back. Back is related to Trunk. 
Ugly <--Antonym--> Moral <--RelatedTo--> Bit <--Synonym--> Moment <--RelatedTo--> Minute 
Sell <--Antonym--> Pay <--RelatedTo--> Back <--RelatedTo--> Trunk 