dutch auction vs selling

dutch auction and selling both are nouns.

Word	Noun	Adjective	Verb	Adverb
dutch auction	Yes	No	No	No
selling	Yes	No	No	No

As nouns, selling is a hypernym of dutch auction; that is, selling is a word with a broader meaning than dutch auction:

dutch auction: a method of selling in which the price is reduced until a buyer is found
selling: the exchange of goods for an agreed sum of money

Other hypernyms of dutch auction include marketing, merchandising.

dutch auction (noun)	selling (noun)
a method of selling in which the price is reduced until a buyer is found	the exchange of goods for an agreed sum of money