Catch is a synonym of Grab. Grab is related to Hold. 
Display is related to Flag. Flag is a type of Decorate. Pipe is a type of Decorate. Pipe is a synonym of Bar. 
Catch <--Synonym--> Grab <--RelatedTo--> Hold 
Display <--RelatedTo--> Flag --IsA--> Decorate <--IsA-- Pipe <--Synonym--> Bar 