Crew is the opposite of Captain. Captain is the opposite of Mate. 
Identify is a synonym of Discover. Discover is a synonym of Invent. Invent is related to Design. Design is related to Drawing. 
Crew <--Antonym--> Captain <--Antonym--> Mate 
Identify <--Synonym--> Discover <--Synonym--> Invent <--RelatedTo--> Design <--RelatedTo--> Drawing 