Water is the opposite of Ground. Ground is the opposite of Roof. Roof is part of Cave. Cave is related to Tunnel. 
Neck is a type of Cut. Cut is related to Computer. 
Water <--Antonym--> Ground <--Antonym--> Roof --PartOf--> Cave <--RelatedTo--> Tunnel 
Neck --IsA--> Cut <--RelatedTo--> Computer 