pusher vs peddler

pusher and peddler both are nouns.

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

As nouns, pusher and peddler are synonyms defined as:

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

pusher (noun)	peddler (noun)
a small vehicle with four wheels in which a baby or child is pushed around	someone who travels about selling his wares (as on the streets or at carnivals)
a sandal attached to the foot by a thong over the toes	an unlicensed dealer in illegal drugs
someone who pushes
an unlicensed dealer in illegal drugs
one who intrudes or pushes himself forward