Writing is related to Like. Like is related to Disease. Infection is a type of Disease. Infection can cause/lead to Death. 
Exhaust is a synonym of Use. Spare is a type of Use. Spare is related to Extra. Extra is related to Additional. 
Writing <--RelatedTo--> Like <--RelatedTo--> Disease <--IsA-- Infection --Causes--> Death 
Exhaust <--Synonym--> Use <--IsA-- Spare <--RelatedTo--> Extra <--RelatedTo--> Additional 