elk nut vs fruit

elk nut and fruit both are nouns.

Word	Noun	Adjective	Verb	Adverb
elk nut	Yes	No	No	No
fruit	Yes	No	Yes	No

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

elk nut (noun)	fruit (noun)
oily drupaceous fruit of rabbitwood	an amount of a product
	the consequence of some effort or action
	the ripened reproductive body of a seed plant

elk nut (verb)	fruit (verb)
	bear fruit
	cause to bear fruit