weeper vs crier

weeper and crier both are nouns.

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

As nouns, weeper and crier are synonyms defined as:

weeper (noun)	crier (noun)
a person who weeps	(formerly) an official who made public announcements
a hired mourner	a person who weeps
	a peddler who shouts to advertise the goods he sells