line of business vs merchandise

line of business and merchandise both are nouns.

Word	Noun	Adjective	Verb	Adverb
line of business	Yes	No	No	No
merchandise	Yes	No	Yes	No

As nouns, merchandise is a hypernym of line of business; that is, merchandise is a word with a broader meaning than line of business:

Other hypernyms of line of business include product, ware.

line of business (noun)	merchandise (noun)
a particular kind of commercial enterprise	items for sale to the individual consumer
a particular kind of product or merchandise	branded products meant to promote another product, especially films and pop groups

line of business (verb)	merchandise (verb)
	engage in the trade of