selling vs merchandising

selling and merchandising both are nouns.

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

As nouns, selling and merchandising are synonyms defined as:

selling and merchandising: the exchange of goods for an agreed sum of money

Other synonyms of selling include marketing.

selling (noun)	merchandising (noun)
the exchange of goods for an agreed sum of money	the exchange of goods for an agreed sum of money
	the business of drawing public attention to goods and services
	branded products meant to promote another product, especially films and pop groups