directory vs listing

directory and listing both are nouns.

Word	Noun	Adjective	Verb	Adverb
directory	Yes	No	No	No
listing	Yes	No	No	No

As nouns, listing is a hypernym of directory; that is, listing is a word with a broader meaning than directory:

directory: (computer science) a listing of the files stored in memory (usually on a hard disk)
listing: a database containing an ordered array of items (names or topics)

Other hypernyms of directory include list.

directory (noun)	listing (noun)
an alphabetical list of names and addresses	the act of making a list of items
(computer science) a listing of the files stored in memory (usually on a hard disk)	a database containing an ordered array of items (names or topics)