Ship is etymologically related to Relationship. Romance is a type of Relationship. Passion can be used for Romance. Passion is related to Enthusiasm. 
Application is related to Paint. Paint is related to Water. Water is related to Drink. Drink is related to Glass. 
Ship --EtymologicallyRelatedTo--> Relationship <--IsA-- Romance <--UsedFor-- Passion <--RelatedTo--> Enthusiasm 
Application <--RelatedTo--> Paint <--RelatedTo--> Water <--RelatedTo--> Drink <--RelatedTo--> Glass 