Toll is a synonym of Tax. Tax is a synonym of Assess. 
Column is related to Pencil. Pencil is related to Straw. Straw is a type of Cover. Uncover is derived from Cover. 
Toll <--Synonym--> Tax <--Synonym--> Assess 
Column <--RelatedTo--> Pencil <--RelatedTo--> Straw --IsA--> Cover <--DerivedFrom-- Uncover 