Engine is related to Boat. Boat is related to Small. Small is the opposite of Old. Old is related to Empire. 
Produce is a synonym of Make. Make is a synonym of Hold. 
Engine <--RelatedTo--> Boat <--RelatedTo--> Small <--Antonym--> Old <--RelatedTo--> Empire 
Produce <--Synonym--> Make <--Synonym--> Hold 