diddle vs swindle

diddle is not a noun while swindle is a noun.

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

As verbs, diddle and swindle are synonyms defined as:

Other synonyms of diddle include bunco, con, defraud, goldbrick, hornswoggle, mulct, nobble, rook, scam, short-change, victimize.

diddle (noun)	swindle (noun)
	the act of swindling by some fraudulent scheme

diddle (verb)	swindle (verb)
manipulate manually or in one's mind or imagination	deprive of by deceit
deprive of by deceit