| Thistle (n.) Any one of several prickly composite plants, especially those of the genera Cnicus, Craduus, and Onopordon. The name is often also applied to other prickly plants. Thesaurus Entries armory, badge, badge of office, badges, baton, blazonry, bramble, brassard, brier, bristle, burr, button, cactus, cap and gown, catchweed, chain, chain of office, class ring, cleavers, cockade, collar, cross, decoration, dress, eagle, emblems, ensigns, fasces, figurehead, fleur-de-lis, goose grass, hammer and sickle, heraldry, insignia, lapel pin, livery, mace, mantle, markings, medal, mortarboard, needle, nettle, old school tie, pin, pine needle, prickle, quill, regalia, ring, rose, school ring, shamrock, sigillography, skull and crossbones, sphragistics, spicule, spiculum, spike, spikelet, spine, staff, sticker, swastika, tartan, thorn, tie, uniform, verge, wand, yucca | ![]() |