Tree is a type of Chase. Tree is a different concept from Specific. Specific is a different concept from Creature. Creature is the opposite of Boat. 
Should is a form of Shall. Should is related to Would. Would is a synonym of Please. 
Chase <--IsA-- Tree <--DistinctFrom--> Specific <--DistinctFrom--> Creature <--Antonym--> Boat 
Shall <--FormOf-- Should <--RelatedTo--> Would <--Synonym--> Please 