Herbaceous plant and Self-heal

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

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

Self-heal noun - Decumbent blue-flowered European perennial thought to possess healing properties; naturalized throughout North America.

Herbaceous plant and self-heal are semantically related. You can use "Herbaceous plant" instead a noun phrase "Self-heal".