Recommend is the opposite of Oppose. Oppose is a type of Argue. Argue is a synonym of Contend. Contend is a synonym of Fight. 
Sleep is related to Nest. Nest is related to Dried. 
Recommend <--Antonym--> Oppose --IsA--> Argue <--Synonym--> Contend <--Synonym--> Fight 
Sleep <--RelatedTo--> Nest <--RelatedTo--> Dried 