sting operation vs bunko

sting operation and bunko both are nouns.

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

As nouns, bunko is a hypernym of sting operation; that is, bunko 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)
bunko: 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 game, con, con game, confidence game, confidence trick, flimflam, hustle, sting.

sting operation (noun)	bunko (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