Smooth is a synonym of Flat. Flat is related to Square. Square is a synonym of Balance. Balance is related to Beam. 
Carve is a type of Cut. Cut is related to Timber. 
Smooth <--Synonym--> Flat <--RelatedTo--> Square <--Synonym--> Balance <--RelatedTo--> Beam 
Carve --IsA--> Cut <--RelatedTo--> Timber 