Doctor is a different concept from Nurse. 
Double is related to Tennis. Tennis is related to Green. you are likely to find Hole in/at/on Green. Hold is etymologically related to Hole. 
Doctor <--DistinctFrom--> Nurse 
Double <--RelatedTo--> Tennis <--RelatedTo--> Green <--AtLocation-- Hole <--EtymologicallyRelatedTo-- Hold 