Rat is a type of Capture. Capture is the opposite of Rescue. Rescue is related to Purpose. 
Fix is a synonym of Specify. Specify is a synonym of Detail. Detail is a synonym of Particular. Particular is related to Specific. 
Rat --IsA--> Capture <--Antonym--> Rescue <--RelatedTo--> Purpose 
Fix <--Synonym--> Specify <--Synonym--> Detail <--Synonym--> Particular <--RelatedTo--> Specific 