elderberry vs stone fruit

elderberry and stone fruit both are nouns.

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

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

elderberry: berrylike fruit of an elder used for e.g. wines and jellies
stone fruit: fleshy indehiscent fruit with a single seed: e.g. almond, peach, plum, cherry, elderberry, olive, jujube

Other hypernyms of elderberry include edible fruit, drupe.

elderberry (noun)	stone fruit (noun)
berrylike fruit of an elder used for e.g. wines and jellies	fleshy indehiscent fruit with a single seed: e.g. almond, peach, plum, cherry, elderberry, olive, jujube
a common shrub with black fruit or a small tree of Europe and Asia; fruit used for wines and jellies