Common sorrel and Leafy vegetable

Common sorrel noun - Large sour-tasting arrowhead-shaped leaves used in salads and sauces.

Leafy vegetable and common sorrel are semantically related. In some cases you can use "Leafy vegetable" instead a noun phrase "Common sorrel".

Leafy vegetable noun - Any of various leafy plants or their leaves and stems eaten as vegetables.

Common sorrel and leafy vegetable are semantically related. Sometimes you can replace phrase "Common sorrel" with "Leafy vegetable", this phrases are similar.