Ligneous plant and Nightshade

Ligneous plant noun - A plant having hard lignified tissues or woody parts especially stems.

Nightshade and ligneous plant are semantically related. In some cases you can replace term "Nightshade" with "Ligneous plant", this terms are similar.

Nightshade noun - Any of numerous shrubs or herbs or vines of the genus Solanum; most are poisonous though many bear edible fruit.

Ligneous plant and nightshade are semantically related. You can use "Ligneous plant" instead a noun "Nightshade".