1. Macabre - shockingly repellent; inspiring horror
2. Machination - a crafty and involved plot to achieve your ends
3. Maculate - spot, stain, or pollute
4. Maelstrom - a powerful circular current of water
5. Magnanimous - noble and generous in spirit
6. Magniloquent - lofty in style
7. Magnitude - the property of relative size or extent
8. Maim - injure or wound seriously and leave permanent disfiguration
9. Majestic - having or displaying great dignity or nobility
10. Malady - any unwholesome or desperate condition
11. Malaise - a feeling of mild sickness or depression
12. Malapropism - misuse of a word by confusion with one that sounds similar
13. Malevolent - wishing or appearing to wish evil to others
14. Malice - the desire to see others suffer
15. Malignant - dangerous to health
16. Malingerer - someone shirking duty by feigning illness or incapacity
17. Malleable - easily influenced
18. Manifestation - an indication of the existence of some person or thing
19. Manifold - many and varied; having many features or forms
20. Manipulate - influence or control shrewdly or deviously
21. Manumit - free from slavery or servitude
22. Mar - cause to become imperfect
23. Marital - of or relating to the state of marriage
24. Maritime - relating to ships or navigation
25. Martyr - one who suffers for the sake of principle
26. Materialistic - marked by a desire for wealth and possessions
27. Materialize - come into being; become reality
28. Maternal - characteristic of a mother
29. Matriarchy - social organization in which a female is the family head
30. Matrix - an enclosure within which something originates or develops
31. Maturation - the process of an individual organism growing organically
32. Maudlin - very sentimental or emotional
33. Maul - injure badly
34. Maven - one who is very skilled in or
35. Maverick - independent in behavior or thought
36. Mawkish - very sentimental or emotional
37. Maxim - a saying that is widely accepted on its own merits
38. Mayhem - violent and needless disturbance
39. Meager - deficient in amount or quality or extent
40. Meander - move or cause to move in a winding or curving course
41. Mediate - act between parties with a view to reconciling differences
42. Melancholy - characterized by or causing or expressing sadness
43. Melee - a noisy riotous fight
44. Mellifluous - pleasing to the ear
45. Melodramatic - characteristic of acting or a stage performance
46. Memorabilia - a record of things worth
47. Menace
48. Menagerie - a collection of live animals for study or display
49. Mendacious - intentionally untrue
50. Mendicant - a pauper who lives by begging
51. Menial - relating to unskilled work, especially domestic work
52. Mercantile - relating to or characteristic of trade or traders
53. Mercenary - a person hired to fight for another country than their own
54. Mercurial - liable to sudden unpredictable change
55. Meretricious - tastelessly showy