pedlar vs crier

pedlar and crier both are nouns.

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

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

pedlar: 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 pedlar include chapman, cheapjack, muffin man, sandboy, transmigrante.

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