flimflam vs swindle

flimflam and swindle both are nouns.

Word	Noun	Adjective	Verb	Adverb
flimflam	Yes	No	No	No
swindle	Yes	No	Yes	No

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

flimflam: a swindle in which you cheat at gambling or persuade a person to buy worthless property
swindle: the act of swindling by some fraudulent scheme

Other hypernyms of flimflam include cheat, fraud, rig.

flimflam (noun)	swindle (noun)
a swindle in which you cheat at gambling or persuade a person to buy worthless property	the act of swindling by some fraudulent scheme

flimflam (verb)	swindle (verb)
	deprive of by deceit