grape juice vs fruit crush

grape juice and fruit crush both are nouns.

Word	Noun	Adjective	Verb	Adverb
grape juice	Yes	No	No	No
fruit crush	Yes	No	No	No

As nouns, fruit crush is a hypernym of grape juice; that is, fruit crush is a word with a broader meaning than grape juice:

Other hypernyms of grape juice include fruit juice.

grape juice (noun)	fruit crush (noun)
the juice of grapes	drink produced by squeezing or crushing fruit