stone fruit vs jujube

stone fruit and jujube both are nouns.

Word	Noun	Adjective	Verb	Adverb
stone fruit	Yes	No	No	No
jujube	Yes	No	No	No

As nouns, jujube is a hyponym of stone fruit; that is, jujube is a word with a more specific, narrower meaning than stone fruit:

stone fruit: fleshy indehiscent fruit with a single seed: e.g. almond, peach, plum, cherry, elderberry, olive, jujube
jujube: dark red plumlike fruit of Old World buckthorn trees

Other hyponyms of stone fruit include almond, peach, plum, cherry, elderberry, Chinese date, Chinese jujube, olive, drupelet.

stone fruit (noun)	jujube (noun)
fleshy indehiscent fruit with a single seed: e.g. almond, peach, plum, cherry, elderberry, olive, jujube	chewy fruit-flavored jellied candy (sometimes medicated to soothe a sore throat)
	dark red plumlike fruit of Old World buckthorn trees
	spiny tree having dark red edible fruits