winter currant vs currant bush

winter currant and currant bush both are nouns.

Word	Noun	Adjective	Verb	Adverb
winter currant	Yes	No	No	No
currant bush	Yes	No	No	No

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

winter currant: a flowering shrub also known as flowering currant or red-flowering currant (Ribes sanguineum)
currant bush: any of various deciduous shrubs of the genus Ribes bearing currants

Other hypernyms of winter currant include currant.

winter currant (noun)	currant bush (noun)
a flowering shrub also known as flowering currant or red-flowering currant (Ribes sanguineum)	any of various deciduous shrubs of the genus Ribes bearing currants