Availability is a different concept from Lack. Lack is related to Hearing. Hearing is related to Noise. 
Storm is a synonym of Force. Force is related to Mass. Mass is related to Conservation. 
Availability <--DistinctFrom--> Lack <--RelatedTo--> Hearing <--RelatedTo--> Noise 
Storm <--Synonym--> Force <--RelatedTo--> Mass <--RelatedTo--> Conservation 