Cultivated cabbage and Head cabbage

Cultivated cabbage noun - Any of various cultivars of the genus Brassica oleracea grown for their edible leaves or flowers.

Head cabbage and cultivated cabbage are semantically related. In some cases you can replace phrase "Head cabbage" with "Cultivated cabbage", this phrases are similar.

Head cabbage noun - Any of various cultivated cabbage plants having a short thick stalk and large compact head of edible usually green leaves.

Cultivated cabbage and head cabbage are semantically related. You can use "Cultivated cabbage" instead a noun phrase "Head cabbage".