Share is a type of Communicate. Sound can be used for Communicate. Sound is related to Single. 
Cover is the opposite of Leave. Leave is a different concept from Stay. Stay is a synonym of Rest. Rest is a synonym of Relieve. 
Share --IsA--> Communicate <--UsedFor-- Sound <--RelatedTo--> Single 
Cover <--Antonym--> Leave <--DistinctFrom--> Stay <--Synonym--> Rest <--Synonym--> Relieve 