Efficient is related to Effective. Effective is related to Real. Real is related to Street. Street is related to Place. 
Logical is related to Rational. Rational is similar to Intelligent. Intelligent is the opposite of Smart. Smart is related to Intelligence. 
Efficient <--RelatedTo--> Effective <--RelatedTo--> Real <--RelatedTo--> Street <--RelatedTo--> Place 
Logical <--RelatedTo--> Rational <--SimilarTo--> Intelligent <--Antonym--> Smart <--RelatedTo--> Intelligence 