currant vs shrub

currant and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
currant	Yes	No	No	No
shrub	Yes	No	No	No

As nouns, shrub is a hypernym of currant; that is, shrub is a word with a broader meaning than currant:

currant: any of various deciduous shrubs of the genus Ribes bearing currants
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of currant include bush.

currant (noun)	shrub (noun)
any of several tart red or black berries used primarily for jellies and jams	a low woody perennial plant usually having several major stems
small dried seedless raisin grown in the Mediterranean region and California; used in cooking
any of various deciduous shrubs of the genus Ribes bearing currants