tickler file vs tickler

tickler file and tickler both are nouns.

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

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

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

tickler file (noun)	tickler (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