town crier vs crier

town crier and crier both are nouns.

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

As nouns, town crier and crier are synonyms defined as:

town crier and crier: (formerly) an official who made public announcements

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