Income is related to Interest. Interested is derived from Interest. Interested is the opposite of Board. Board is related to Flat. 
Dock is related to Boat. you are likely to find Cargo in/at/on Boat. Cargo is related to Transport. Transport is a synonym of Send. 
Income <--RelatedTo--> Interest <--DerivedFrom-- Interested <--Antonym--> Board <--RelatedTo--> Flat 
Dock <--RelatedTo--> Boat <--AtLocation-- Cargo <--RelatedTo--> Transport <--Synonym--> Send 