Jerusalem artichoke and Root vegetable

Jerusalem artichoke noun - Sunflower tuber eaten raw or boiled or sliced thin and fried as Saratoga chips.

Root vegetable and Jerusalem artichoke are semantically related. In some cases you can use "Root vegetable" instead a noun phrase "Jerusalem artichoke".

Root vegetable noun - Any of various fleshy edible underground roots or tubers.

Jerusalem artichoke and root vegetable are semantically related. Sometimes you can replace phrase "Jerusalem artichoke" with "Root vegetable", this phrases are similar.