1. mountain ebony small East Indian tree having orchid-like flowers and hard dark wood
  2. mountain pine tall pine of western North America with stout blue-green needles; bark is grey-brown with rectangular plates when mature
  3. mountain lion large American feline resembling a lion
  4. mountain bike a bicycle with a sturdy frame and fat tires
  5. mountain man a man who lives on the frontier
  6. mountain pass the location in a range of mountains of a geological formation that is lower than the surrounding peaks
  7. mountain chain a series of hills or mountains
  8. mountain peak the summit of a mountain
  9. mountaineering the activity of climbing a mountain
  10. fountain pen a pen that is supplied with ink from a reservoir in its barrel
  11. mountain paca rodent of mountains of western South America
  12. mountain box evergreen mat-forming shrub of North America and northern Eurasia having small white flowers and red berries; leaves turn red in autumn
  13. mountain anemone silky-foliaged herb of the Rocky Mountains with bluish-white flowers
  14. maintainable capable of being maintained
  15. mountain avens creeping evergreen shrub with large white flowers
  16. mountain zebra narrow-striped nearly extinct zebra of southern Africa
  17. mountain fern common European mountain fern having fragrant lemon or balsam scented fronds
  18. mountain mint any of a number of perennial herbs of the genus Pycnanthemum
  19. mountain tent a lightweight tent with a floor; flaps close with a zipper
  20. mountain range a series of hills or mountains