Home › Words › C › cottonweedcottonweedcottonweed means any of several not closely related plants that have downy heads; especially such plants of the genus Froelichia.EtymologyFrom cotton + weed.nounAny of several not closely related plants that have downy heads; especially such plants of the genus Froelichia.Any of several not closely related plants that have downy heads; Cottontop, a plant of genus Micropus.Definitions & examples from Wiktionary (CC BY-SA 3.0).Words closest in meaningBy meaning, not spelling — each word's AI semantic fingerprint, nearest first.silkweed 62% match — Any plant of the genus Asclepias whose seed vessels contain a long, silky down; milkweed. vs cottonweed →cottonlike 62% match — Resembling cotton. vs cottonweed →cottonrose 61% match — Any of the genera Filago and Logfia of flowering plants of Eurasia and North America. vs cottonweed →cottonwood 61% match — A tree from one of number of species of tree in the genus Populus (poplars), typically growing along watercourses, with fluffy catkins. vs cottonweed →milkweed 61% match — Any of several plants that have a milky sap and have pods that split to release seeds with silky tufts.; Principally of the genus Asclepias in order Gentianales, family Apocynaceae vs cottonweed →cottongrass 60% match — Various species of plants of genus Eriophorum in the sedge family vs cottonweed →butterweed 60% match — Any of various herbaceous flowering plants in the genus Conyza or Erigeron. vs cottonweed →buttonweed 59% match — Any of numerous species of plants with button-like flowers, especially:; Any of several plants of the genera Diodia and Hexasepalum (syn. Diodella), of the madder family. vs cottonweed →