peddler vs crier

peddler and crier both are nouns.

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

As nouns, crier is a hyponym of peddler; that is, crier is a word with a more specific, narrower meaning than peddler:

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

Other hyponyms of peddler include chapman, cheapjack, muffin man, sandboy, transmigrante.

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