Copy is related to Command. Commission is a type of Command. Commission is a synonym of Authorize. Authorize is a synonym of Approve. 
Fatigue is similar to Strain. Strain is a synonym of Form. Form is related to Design. Design is related to Lay. 
Copy <--RelatedTo--> Command <--IsA-- Commission <--Synonym--> Authorize <--Synonym--> Approve 
Fatigue <--SimilarTo--> Strain <--Synonym--> Form <--RelatedTo--> Design <--RelatedTo--> Lay 