Pie plant and Rhubarb

Pie plant noun - Long cultivated hybrid of Rheum palmatum; stems often cooked in pies or as sauce or preserves.

Rhubarb and pie plant are semantically related. In some cases you can use "Rhubarb" instead a noun phrase "Pie plant".

Rhubarb noun - An often noisy or angry expression of differing opinions.

Pie plant and rhubarb are semantically related. Sometimes you can replace phrase "Pie plant" with "Rhubarb", this terms are similar.