1. brook thistle of central and southwestern Europe
  2. boar thistle European thistle with rather large heads and prickly leaves
  3. milk thistle any of several Old World coarse prickly-leaved shrubs and subshrubs having milky juice and yellow flowers; widely naturalized; often noxious weeds in cultivated soil
  4. horse thistle European annual wild lettuce having prickly stems
  5. blue thistle a coarse prickly European weed with spikes of blue flowers
  6. bull thistle European thistle with rather large heads and prickly leaves
  7. musk thistle Eurasian perennial naturalized in eastern North America having very spiny white cottony foliage and nodding musky crimson flower heads; valuable source of nectar
  8. boat whistle a whistle on a boat that is sounded as a warning
  9. bristle a stiff hair
  10. spear thistle European thistle with rather large heads and prickly leaves
  11. plume thistle any of numerous biennial to perennial herbs with handsome purple or yellow or occasionally white flower heads
  12. brook trout North American freshwater trout; introduced in Europe
  13. parachutist a person who jumps from aircraft using a parachute
  14. practical guided by experience and observation rather than theory
  15. practised skillful after much practice
  16. practise engage in a rehearsal (of)
  17. Protoctista in most modern classifications, replacement for the Protista
  18. practice a customary way of operation or behavior
  19. bristly having or covered with protective barbs or spines
  20. protoctist any of the unicellular protists