chapman vs packman

chapman and packman both are nouns.

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

As nouns, packman is a hypernym of chapman; that is, packman is a word with a broader meaning than chapman:

chapman: archaic term for an itinerant peddler
packman: someone who travels about selling his wares (as on the streets or at carnivals)

Other hypernyms of chapman include hawker, peddler, pedlar, pitchman.

chapman (noun)	packman (noun)
archaic term for an itinerant peddler	someone who travels about selling his wares (as on the streets or at carnivals)