Suspect is a synonym of Suppose. Suppose is a synonym of Think. Think is a type of Judge. you are likely to find Judge in/at/on Courtroom. 
Defend is a type of Argue. Argue entails/necessarily involves Disagree. Disagree is a synonym of Differ. 
Suspect <--Synonym--> Suppose <--Synonym--> Think --IsA--> Judge --AtLocation--> Courtroom 
Defend --IsA--> Argue --Entails--> Disagree <--Synonym--> Differ 