character set vs listing

character set and listing both are nouns.

Word	Noun	Adjective	Verb	Adverb
character set	Yes	No	No	No
listing	Yes	No	No	No

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

character set: an ordered list of characters that are used together in writing or printing
listing: a database containing an ordered array of items (names or topics)

Other hypernyms of character set include list.

character set (noun)	listing (noun)
an ordered list of characters that are used together in writing or printing	the act of making a list of items
	a database containing an ordered array of items (names or topics)