1. mastabah an ancient Egyptian mud-brick tomb with a rectangular base and sloping sides and flat roof
  2. mastaba an ancient Egyptian mud-brick tomb with a rectangular base and sloping sides and flat roof
  3. misstep an unintentional but embarrassing blunder
  4. basset oboe an oboe pitched an octave below the ordinary oboe
  5. masseter a large muscle that raises the lower jaw and is used in chewing
  6. mason bee any of numerous solitary bees that build nests of hardened mud and sand
  7. master a person who has authority over others
  8. masthead a staff list printed in a newspaper or magazine
  9. mastery great skillfulness and knowledge of some subject or activity
  10. mastiff an old breed of powerful deep-chested smooth-coated dog used chiefly as a watchdog and guard dog
  11. mastoid process of the temporal bone behind the ear at the base of the skull
  12. stubby short and blunt
  13. mastic an evergreen shrub of the Mediterranean region that is cultivated for its resin
  14. mastopathy any pathology of the breast
  15. mousetrap a trap for catching mice
  16. muster up gather or bring together
  17. masted having or furnished with a mast; often used in combination
  18. Mossad the Israeli foreign intelligence agency
  19. Masoud Afghan leader of forces opposed to the Taliban
  20. test tube glass tube closed at one end