Herbaceous plant and Knob celery

Herbaceous plant noun - A plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests.

Knob celery and herbaceous plant are semantically related. In some cases you can replace phrase "Knob celery" with "Herbaceous plant", this phrases are similar.

Knob celery noun - Grown for its thickened edible aromatic root.

Herbaceous plant and knob celery are semantically related. You can use "Herbaceous plant" instead a noun phrase "Knob celery".