marketing research vs research

marketing research and research both are nouns.

Word	Noun	Adjective	Verb	Adverb
marketing research	Yes	No	No	No
research	Yes	No	Yes	No

As nouns, research is a hypernym of marketing research; that is, research is a word with a broader meaning than marketing research:

marketing research: research that gathers and analyzes information about the moving of good or services from producer to consumer
research: systematic investigation to establish facts

marketing research (noun)	research (noun)
research that gathers and analyzes information about the moving of good or services from producer to consumer	systematic investigation to establish facts
	a search for knowledge

marketing research (verb)	research (verb)
	inquire into
	attempt to find out in a systematically and scientific manner