Noise is the opposite of Tone. Tone is a type of Quality. 
Moral is a synonym of Virtual. Virtual is a different concept from Physical. Physical is related to Exist. Exist is a synonym of Survive. 
Noise <--Antonym--> Tone --IsA--> Quality 
Moral <--Synonym--> Virtual <--DistinctFrom--> Physical <--RelatedTo--> Exist <--Synonym--> Survive 