filing clerk vs filer

filing clerk and filer both are nouns.

Word	Noun	Adjective	Verb	Adverb
filing clerk	Yes	No	No	No
filer	Yes	No	No	No

As nouns, filing clerk and filer are synonyms defined as:

filing clerk and filer: a clerk who is employed to maintain the files of an organization

Other synonyms of filing clerk include file clerk.

filing clerk (noun)	filer (noun)
a clerk who is employed to maintain the files of an organization	a party who files a notice with a law court
	a clerk who is employed to maintain the files of an organization