syndication vs selling

syndication and selling both are nouns.

Word	Noun	Adjective	Verb	Adverb
syndication	Yes	No	No	No
selling	Yes	No	No	No

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

syndication: selling (an article or cartoon) for publication in many magazines or newspapers at the same time
selling: the exchange of goods for an agreed sum of money

Other hypernyms of syndication include marketing, merchandising.

syndication (noun)	selling (noun)
organizing into or administering as a syndicate	the exchange of goods for an agreed sum of money
selling (an article or cartoon) for publication in many magazines or newspapers at the same time