Full is a different concept from Empty. Empty is a synonym of Clean. Clean is a synonym of Pick. Pick is related to Cotton. 
Spit is part of Rack. Spit is the opposite of Drink. Drink is related to Food. Orange is a type of Food. 
Full <--DistinctFrom--> Empty <--Synonym--> Clean <--Synonym--> Pick <--RelatedTo--> Cotton 
Rack <--PartOf-- Spit <--Antonym--> Drink <--RelatedTo--> Food <--IsA-- Orange 