Departure is a synonym of Exit. Exit is the opposite of Come. Come is related to Go. Go is related to Steady. 
Mathematics is related to Genre. Genre is related to Comedy. Comedy is related to Laugh. 
Departure <--Synonym--> Exit <--Antonym--> Come <--RelatedTo--> Go <--RelatedTo--> Steady 
Mathematics <--RelatedTo--> Genre <--RelatedTo--> Comedy <--RelatedTo--> Laugh 