Tough is a different concept from Tender. Tender is related to Gentle. Gentle is a synonym of Friendly. Friendly is related to Home. 
Frozen is related to Shake. Shake is related to People. People is related to Crew. 
Tough <--DistinctFrom--> Tender <--RelatedTo--> Gentle <--Synonym--> Friendly <--RelatedTo--> Home 
Frozen <--RelatedTo--> Shake <--RelatedTo--> People <--RelatedTo--> Crew 