Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun horseweed

2 senses of horseweed

Sense 1
horse balm, horseweed, stoneroot, stone-root, richweed, stone root, Collinsonia canadensis -- (erect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowers; the eastern United States)
       => herb, herbaceous plant -- (a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests)

Sense 2
horseweed, Canadian fleabane, fleabane, Conyza canadensis, Erigeron canadensis -- (common North American weed with linear leaves and small discoid heads of yellowish flowers; widely naturalized throughout temperate regions; sometimes placed in genus Erigeron)
       => weed -- (any plant that crowds out cultivated plants)