Peaceful is related to Treaty. Treaty is a synonym of Agreement. Agreement is the opposite of Dispute. Dispute is related to Argue. 
Nerve is a synonym of Steel. you are likely to find Steel in/at/on Factory. Factory is related to Smoke. Sex would make you want to Smoke. 
Peaceful <--RelatedTo--> Treaty <--Synonym--> Agreement <--Antonym--> Dispute <--RelatedTo--> Argue 
Nerve <--Synonym--> Steel --AtLocation--> Factory <--RelatedTo--> Smoke <--CausesDesire-- Sex 