Thinking can be used for Intelligent. Intelligent is similar to Rational. 
Inner is related to Room. Room is related to Household. Household is related to Paint. Paint is related to Artist. 
Thinking --UsedFor--> Intelligent <--SimilarTo--> Rational 
Inner <--RelatedTo--> Room <--RelatedTo--> Household <--RelatedTo--> Paint <--RelatedTo--> Artist 