drug dealer vs drug peddler

drug dealer and drug peddler both are nouns.

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

As nouns, drug dealer and drug peddler are synonyms defined as:

Other synonyms of drug dealer include drug trafficker, peddler, pusher.

drug dealer (noun)	drug peddler (noun)
an unlicensed dealer in illegal drugs	an unlicensed dealer in illegal drugs