Exhaust is related to Gas. Gas is the opposite of Solid. Solid is related to Metal. Metal is related to Precious. 
Increase is a synonym of Inflation. Inflation is a type of Explosion. Explosion is a synonym of Boom. 
Exhaust <--RelatedTo--> Gas <--Antonym--> Solid <--RelatedTo--> Metal <--RelatedTo--> Precious 
Increase <--Synonym--> Inflation --IsA--> Explosion <--Synonym--> Boom 