honours list vs listing

honours list and listing both are nouns.

Word	Noun	Adjective	Verb	Adverb
honours list	Yes	No	No	No
listing	Yes	No	No	No

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

honours list: a list issued by examiners that categorizes students according to the class of honours they achieved in their degree examinations
listing: a database containing an ordered array of items (names or topics)

Other hypernyms of honours list include list.

honours list (noun)	listing (noun)
a list issued by examiners that categorizes students according to the class of honours they achieved in their degree examinations	the act of making a list of items
	a database containing an ordered array of items (names or topics)