pitchman vs packman

pitchman and packman both are nouns.

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

As nouns, pitchman and packman are synonyms defined as:

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

Other synonyms of pitchman include hawker, peddler, pedlar.

pitchman (noun)	packman (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