1. opossum rat terrestrial marsupials of southern South America that resemble shrews
  2. postmark a cancellation mark stamped on mail by postal officials
  3. pressmark a mark consisting of characters written on a book
  4. peace march a protest march against war and in favor of peace
  5. Jacques Marquette French missionary who accompanied Louis Joliet in exploring the upper Mississippi River valley (1637-1675)
  6. outside marriage of unwed parents
  7. besmirch smear so as to make dirty or stained
  8. Apios americana a North American vine with fragrant blossoms and edible tubers; important food crop of Native Americans
  9. lubber's mark a fixed line on a ship's compass indicating its heading
  10. easy mark a defenseless victim
  11. Bismarck German statesman under whose leadership Germany was united
  12. open-air market a public marketplace where food and merchandise is sold
  13. bismark a raised doughnut filled with jelly or jam
  14. accent mark a diacritical mark used to indicate stress or placed above a vowel to indicate a special pronunciation
  15. same-sex marriage two people of the same sex who live together as a family
  16. letters of marque a license to a private citizen to seize property of another nation
  17. isomeric of or relating to or exhibiting isomerism
  18. assay-mark a mark on an article of trade to indicate its origin and authenticity
  19. open sesame a magical command; used by Ali Baba
  20. Iles Marquises a group of volcanic islands in the south central Pacific