sting operation vs flimflam

sting operation and flimflam both are nouns.

Word	Noun	Adjective	Verb	Adverb
sting operation	Yes	No	No	No
flimflam	Yes	No	No	No

As nouns, flimflam is a hypernym of sting operation; that is, flimflam is a word with a broader meaning than sting operation:

sting operation: a complicated confidence game planned and executed with great care (especially an operation implemented by undercover agents to apprehend criminals)
flimflam: a swindle in which you cheat at gambling or persuade a person to buy worthless property

Other hypernyms of sting operation include bunco, bunco game, bunko, bunko game, con, con game, confidence game, confidence trick, hustle, sting.

sting operation (noun)	flimflam (noun)
a complicated confidence game planned and executed with great care (especially an operation implemented by undercover agents to apprehend criminals)	a swindle in which you cheat at gambling or persuade a person to buy worthless property
operation designed to catch a person committing a criminal act