shouter vs crier

shouter and crier both are nouns.

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

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

shouter (noun)	crier (noun)
someone who communicates vocally in a very loud voice	(formerly) an official who made public announcements
	a person who weeps
	a peddler who shouts to advertise the goods he sells