1. backcross mate a hybrid of the first generation with one of its parents
  2. bleachers an outdoor grandstand without a roof
  3. breakers waves breaking on the shore
  4. Quakers a Christian sect founded by George Fox about 1660
  5. beach grass tough grasses with strong roots that can grow on exposed sandy shores
  6. crackers informal or slang terms for mentally irregular
  7. checkers a checkerboard game for two players who each have 12 pieces
  8. bonkers informal or slang terms for mentally irregular
  9. Phacochoerus warthogs
  10. packhorse a workhorse used as a pack animal
  11. bikers originally a British youth subculture that evolved out of the teddy boys in the 1960s; wore black leather jackets and jeans and boots; had greased hair and rode motorcycles and listened to rock'n'roll; were largely unskilled manual laborers
  12. quackgrass European grass spreading rapidly by creeping rhizomes
  13. Shakers a celibate and communistic Christian sect in the United States
  14. rock cress any of several rock-loving cresses of the genus Arabis
  15. packer a workman employed to pack things into containers
  16. cockhorse anything used as a toy horse
  17. Packera genus of American of east Asian perennial herbs with yellow to orange or red flower rays; sometimes included in genus Senecio
  18. rockcress any of several rock-loving cresses of the genus Arabis
  19. black grouse grouse of which the male is bluish-black
  20. quack grass European grass spreading rapidly by creeping rhizomes

Sign up, it's free!

Whether you're a student, an educator, or a lifelong learner, Vocabulary.com can put you on the path to systematic vocabulary improvement.