Successful is a synonym of Effective. Effective is related to Real. Real is related to Credibility. Credibility is a type of Quality. 
Head is a type of Pressure. Head is a synonym of Origin. Origin is related to Native. Native is related to Homeland. 
Successful <--Synonym--> Effective <--RelatedTo--> Real <--RelatedTo--> Credibility --IsA--> Quality 
Pressure <--IsA-- Head <--Synonym--> Origin <--RelatedTo--> Native <--RelatedTo--> Homeland 