pitchman vs peddler

pitchman and peddler both are nouns.

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

As nouns, pitchman and peddler are synonyms defined as:

pitchman and peddler: someone who travels about selling his wares (as on the streets or at carnivals)

Other synonyms of pitchman include hawker, packman, pedlar.

pitchman (noun)	peddler (noun)
someone who travels about selling his wares (as on the streets or at carnivals)	someone who travels about selling his wares (as on the streets or at carnivals)
an aggressive salesman who uses a fast line of talk to sell something	an unlicensed dealer in illegal drugs