Open English Wordnet
Nouns
(n)horse balm, horseweed, stoneroot, stone-root, richweed, stone root, Collinsonia canadensiserect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowers; the eastern United States
(n)richweed, clearweed, dead nettle, Pilea pumillaa plants of the genus Pilea having drooping green flower clusters and smooth translucent stems and leaves