Tough is a different concept from Tender. Tender is related to Gentle. Gentle is a synonym of Friendly. Friendly is related to Home. 
you are likely to find Book in/at/on House. House is related to Man. Man is related to Club. 
Tough <--DistinctFrom--> Tender <--RelatedTo--> Gentle <--Synonym--> Friendly <--RelatedTo--> Home 
Book --AtLocation--> House <--RelatedTo--> Man <--RelatedTo--> Club 