tickler vs tickler file

tickler and tickler file both are nouns.

Word	Noun	Adjective	Verb	Adverb
tickler	Yes	No	No	No
tickler file	Yes	No	No	No

As nouns, tickler and tickler file are synonyms defined as:

tickler and tickler file: a file of memoranda or notices that remind of things to be done

tickler (noun)	tickler file (noun)
a file of memoranda or notices that remind of things to be done	a file of memoranda or notices that remind of things to be done