Work is the opposite of Unemployment. Unemployment is a type of State. State is a synonym of Land. Land is related to Estate. 
Satisfy is related to Glad. Glad is related to Relief. Relief is a synonym of Comfort. Convenience is a type of Comfort. 
Work <--Antonym--> Unemployment --IsA--> State <--Synonym--> Land <--RelatedTo--> Estate 
Satisfy <--RelatedTo--> Glad <--RelatedTo--> Relief <--Synonym--> Comfort <--IsA-- Convenience 