cola nut vs nut

cola nut and nut both are nouns.

Word	Noun	Adjective	Verb	Adverb
cola nut	Yes	No	No	No
nut	Yes	No	Yes	No

As nouns, nut is a hypernym of cola nut; that is, nut is a word with a broader meaning than cola nut:

cola nut (noun)	nut (noun)
bitter brown seed containing caffein; source of cola extract	a small (usually square or hexagonal) metal block with internal screw thread to be fitted onto a bolt
	one of the two male reproductive glands that produce spermatozoa and secrete androgens
	someone who is so ardently devoted to something that it resembles an addiction
	a whimsically eccentric person
	usually large hard-shelled seed
	half the width of an em

cola nut (verb)	nut (verb)
	gather nuts