drupe vs jujube

drupe and jujube both are nouns.

Word	Noun	Adjective	Verb	Adverb
drupe	Yes	No	No	No
jujube	Yes	No	No	No

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

drupe: 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 drupe include almond, peach, plum, cherry, elderberry, Chinese date, Chinese jujube, olive, drupelet.

drupe (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