Discover is related to Found. Found is the opposite of Hide. Island can be used for Hide. Island is a type of Book. 
Tape is a type of Attach. Attach is a synonym of Seize. Rack is a type of Seize. 
Discover <--RelatedTo--> Found <--Antonym--> Hide <--UsedFor-- Island --IsA--> Book 
Tape --IsA--> Attach <--Synonym--> Seize <--IsA-- Rack 