tickler vs data file

tickler and data file both are nouns.

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

As nouns, data file is a hypernym of tickler; that is, data file is a word with a broader meaning than tickler:

tickler: a file of memoranda or notices that remind of things to be done
data file: a set of related records (either written or electronic) kept together

Other hypernyms of tickler include file.

tickler (noun)	data file (noun)
a file of memoranda or notices that remind of things to be done	a set of related records (either written or electronic) kept together