peddler vs dealer

peddler and dealer both are nouns.

Word	Noun	Adjective	Verb	Adverb
peddler	Yes	No	No	No
dealer	Yes	No	No	No

As nouns, dealer is a hypernym of peddler; that is, dealer is a word with a broader meaning than peddler:

Other hypernyms of peddler include criminal, crook, felon, malefactor, outlaw.

peddler (noun)	dealer (noun)
someone who travels about selling his wares (as on the streets or at carnivals)	a firm engaged in trading
an unlicensed dealer in illegal drugs	a seller of illicit goods
	the person who distributes the playing cards in a card game
	someone who purchases and maintains an inventory of goods to be sold
	the major party to a financial transaction at a stock exchange; buys and sells for his own account