Synonyms for Kale:

n.

kale (noun)
borecole, Brassica Oleracea Acephala, bread, cabbage, cole, colewort, dinero, dough, gelt, kail, loot, lucre, moolah, pelf, shekels.
vegetable (noun)
cabbage, cole, colewort.
vegetables (noun)
acorn squash, artichoke, arugula, asparagus, aubergine, beet, beetroot, bell pepper, Bok Choy, bamboo shoots.

Other synonyms:

Brassica oleracea acephala
Brassica Oleracea Acephala.
Other relevant words:
artichoke, arugula, asparagus, aubergine, beet, beetroot.