Synonyms for Kale:

n.

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

Other synonyms:

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