crier vs packman

crier and packman both are nouns.

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

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

crier: a peddler who shouts to advertise the goods he sells
packman: someone who travels about selling his wares (as on the streets or at carnivals)

Other hypernyms of crier include hawker, peddler, pedlar, pitchman, bawler, bellower, roarer, screamer, screecher, shouter, yeller.

crier (noun)	packman (noun)
(formerly) an official who made public announcements	someone who travels about selling his wares (as on the streets or at carnivals)
a person who weeps
a peddler who shouts to advertise the goods he sells