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Synonyms for Richweed (same or very similar meaning)

WordNet sense 1 (erect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowers; the eastern United States):
horseweed, stoneroot, stone-root, horse balm, Collinsonia canadensis, stone root

WordNet sense 2 (a plants of the genus Pilea having drooping green flower clusters and smooth translucent stems and leaves):
clearweed, dead nettle, Pilea pumilla

From the ODE community, based on WordNetadd/edit