Black currant and Currant bush

Black currant noun - Widely cultivated current bearing edible black aromatic berries.

Currant bush and black currant are semantically related. In some cases you can use "Currant bush" instead a noun phrase "Black currant".

Currant bush noun - Any of various deciduous shrubs of the genus Ribes bearing currants.

Black currant and currant bush are semantically related. Sometimes you can replace phrase "Black currant" with "Currant bush", this phrases are similar.