Delay is a synonym of Stay. Stay is the opposite of Walk. Walk is related to Speed. 
Deep is related to Concern. Concerned is a form of Concern. Concerned is similar to Afraid. Afraid is a synonym of Anxious. 
Delay <--Synonym--> Stay <--Antonym--> Walk <--RelatedTo--> Speed 
Deep <--RelatedTo--> Concern <--FormOf-- Concerned <--SimilarTo--> Afraid <--Synonym--> Anxious 