Hearing is a type of Session. Hearing is a different concept from Smell. Smell is related to Quality. Quality is a synonym of Character. 
Delay is a synonym of Suspend. Suspend is a type of Change. Soften is a type of Change. 
Session <--IsA-- Hearing <--DistinctFrom--> Smell <--RelatedTo--> Quality <--Synonym--> Character 
Delay <--Synonym--> Suspend --IsA--> Change <--IsA-- Soften 