con game vs flimflam

con game and flimflam both are nouns.

Word	Noun	Adjective	Verb	Adverb
con game	Yes	No	No	No
flimflam	Yes	No	No	No

As nouns, con game and flimflam are synonyms defined as:

con game and flimflam: a swindle in which you cheat at gambling or persuade a person to buy worthless property

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

con game (noun)	flimflam (noun)
a swindle in which you cheat at gambling or persuade a person to buy worthless property	a swindle in which you cheat at gambling or persuade a person to buy worthless property