Area is a synonym of Patch. Patch is related to Small. Small is related to Jacket. Sack is a type of Jacket. 
Thumb is related to Toe. Toe is related to Short. 
Area <--Synonym--> Patch <--RelatedTo--> Small <--RelatedTo--> Jacket <--IsA-- Sack 
Thumb <--RelatedTo--> Toe <--RelatedTo--> Short 