Extension is a type of Delay. Delay is a synonym of Stay. 
Know is a different concept from Surprise. Surprise is a type of Act. Act is related to Grow. Stretch is a type of Grow. 
Extension --IsA--> Delay <--Synonym--> Stay 
Know <--DistinctFrom--> Surprise --IsA--> Act <--RelatedTo--> Grow <--IsA-- Stretch 